CN112837077A - A method and system for food traceability health code - Google Patents

Abstract

The invention discloses a method and a system for tracing health codes of food, wherein the method comprises a tracing part and a collaborative monitoring part, and the collaborative monitoring step is parallel to the tracing process step; the tracing step comprises the steps of obtaining initialized tracing product information and an initialized product health code state, and further initializing the current tracing digital assets; acquiring digital asset circulation; acquiring terminal management and control of digital asset circulation, and canceling the circulation of a single tracing code; the cooperative supervision step comprises the steps of obtaining product cooperative quality feedback of the traced products; and automatically executing an intelligent contract according to the quality feedback condition, and controlling the feedback of the health state of the traced product. The system comprises a production module, a circulation module, a consumption module, a supervision module and a detection module. The invention can relieve the pressure of monitoring resource scarcity by maintaining the health status pool in multiple ways, and can prevent secondary damage caused by identifying the problem product in the first time under the condition that the problem product appears.

Description

Method and system for food traceability health code

technical field

The invention relates to the application field of food safety and traceability, in particular to a method and a system for a food traceability health code.

Background technique

With the expansion of food production and consumption in China, the fast-growing food industry can effectively alleviate the domestic food shortage problem. However, food safety incidents in recent years have exposed the shortcomings of the food safety supervision mechanism, and have also attracted the attention of all sectors of society to food safety issues.

At present, in response to food safety issues, scholars and enterprises from all walks of life have proposed to establish a food traceability and traceability platform for supervision. The current platform models for food traceability are divided into: enterprise self-built platforms, government-organized platforms, and third-party service platforms. However, the traceability islands formed by the independence of each platform cannot form an effective traceability supervision in the case of scarce supervision resources. Secondly, the food traceability code has the risk of double spending and lacks credibility. Furthermore, the current traceability platform cannot immediately prevent the secondary damage caused by the identified problem food.

SUMMARY OF THE INVENTION

The invention proposes a food traceability health code method, traceability method and system, so as to realize multi-party coordinated supervision of food traceability, prevent secondary damage of problematic food, and increase the reliability of food traceability.

To achieve the above object, the present invention has adopted the following technical solutions:

A method for tracing health codes for food, comprising a traceability part and a collaborative supervision part, wherein the collaborative supervision process is parallel to the traceability process;

in,

The retrospective steps include:

Obtain initial traceable product information and initialize the product health code status, and then initialize the current traceable digital assets; obtain digital asset circulation; obtain terminal management and control of digital asset circulation, and cancel the liquidity of a single traceability code;

The collaborative supervision steps include:

Obtain product collaborative quality feedback of traceable products; automatically execute smart contracts according to the quality feedback to control the health status feedback of traceable products.

Further, the obtaining of the product collaborative quality feedback of the traceable product specifically includes the following four parallel steps:

Get consumer feedback; get distributor feedback; get regulator feedback; get tester feedback;

in,

Obtaining consumer feedback requires verifying the consumer's identity information and determining the ownership of their digital assets;

Obtain feedback from distributors, and service nodes detect their identity through CA to determine the ownership of their digital assets;

To obtain feedback from the regulator, the service node detects the identity through the CA and verifies one of the three conditions: 1) the ownership of a certain digital asset in the same batch; 2) the message jointly signed by the regulator and the consumer or the tester; 3) supervision A signed message between the owner and the distributor of the digital asset owner;

Obtain the feedback from the tester, and the service node detects the identity through the CA to determine the ownership of the test sample provided.

Further, the obtaining of the product collaboration quality feedback of the traceable product also includes the service node injecting the feedback information into the feedback pool of the health code associated with its digital asset after successfully verifying the appeal information, and broadcasting it to other nodes in the blockchain. .

Further, the automatic execution of the smart contract according to the quality feedback to control the health status feedback of the traceable products specifically includes:

The smart contract weights and accumulates the abnormal health values of its batches according to the unhealthy feedback of the feedback pool. The contract stipulates three levels of thresholds: regulatory intervention, yellow code warning, and red code stop;

When the abnormal value exceeds the appeal threshold, the smart contract automatically informs the supervision node and detects the node according to the agreement; when the abnormal value accumulates to the red code and stops, its related digital assets cannot be circulated and traded normally.

Further, the smart contract provides a query interface to facilitate the query of traceable product health, circulation and feedback.

Further, the initializing the product health code state includes:

Build the static data block of the health code block; bind the health code to the same batch of traceable digital assets;

Initialize the health code block status block;

Specifically, after the service node in the blockchain obtains the traceable product information provided by the manufacturer, it needs to request the CA to verify its legality;

For the same batch of traceable products provided by legal manufacturers, check whether the traceability code is double-spend. For batches with no double-spend problem in the traceability code, the service node performs hash operation on its basic information to generate the corresponding root hash, and then the The batch root hash forms a Merkle hash tree, and generates the hash value of the Merkleroot and the hash value of the last static data block, health code, signature health code, production enterprise public key, current version number and timestamp, which are stored in the initialization method. Static data in the health code data block;

After that, bind the health code to each traceable product block data. The pre-binding step needs to verify whether the hash value of its basic information exists in the Merkle hash tree of the health code block. The service node in the blockchain will Qualified traceable product blocks are bound to the health code and the hash value of the current health code static data block, and the circulation state and circulation pool are initialized;

After the two-way binding is finally completed, the service node will initialize the status block of the health code block. After completing the above steps, the service node will broadcast the health code block and the batch traceable product block, and the digital asset will take effect. .

Further, the obtaining of digital asset circulation specifically includes:

After the service node of the blockchain obtains the circulation request, it verifies the information, checks the identity of the distributor, and finally changes the owner of the traceable product, and broadcasts the information to each node;

For the circulation of a large number of digital assets, the client of the circulation side packages the large batch of digital assets through a batch program, performs batch signatures, and finally submits an application to the blockchain service cluster to complete the outbound operation.

Further, the obtaining of digital asset circulation specifically includes:

After the service node obtains the consumption request, it modifies the owner of the traceable product, then cancels the liquidity of the digital asset, and broadcasts the information to each node. In addition, for the digital asset whose life cycle has ended, the smart contract automatically cancels its liquidity. ;

Among them, for the situation where the health code status is red and the circulation is prohibited, the consumption module and the circulation module will reject the invocation of its circulation request, and the service node will reject the service of its circulation and consumption request.

On the other hand, the present invention also discloses a system for food traceability health code, comprising the following units:

Production module, circulation module, consumption module, supervisor module, detection module;

The production module is used to manage traceability codes, initialize traceability product information and initialize product health code status;

The circulation module is used to trace asset circulation and product collaborative quality feedback when performing product circulation tasks retrospectively;

The consumption module is used for the management and control of the traceability end, and cancels the liquidity and product quality feedback of a single traceability code;

The supervisor module is used for the supervisor to inquire about the multi-level early warning status products within the system, as well as the information processing and feedback of the primary early warning;

The detection party module is used for the detection process of the detection party in the internal circulation process of the system, as well as the information processing and detection feedback of the secondary early warning.

Further, it also includes the following units:

The traceability code structure is used to record the traceability code, the key field information of the traceable product, the associated health code and the owner of the current traceable asset;

The health code structure is used to record approved health codes, traceability codes of product groups, health status data and status characteristics of product groups.

As can be seen from the above-mentioned technical solutions, the method and system of the food traceability health code of the present invention have the following beneficial effects:

The present invention provides a method and system for coordinated supervision of food health traceability, which can relieve the pressure of scarcity of supervision resources by maintaining the health state pool through multiple parties, and can prevent the identification of problem products at the first time when problem products occur. secondary damage. In terms of probability, it is guaranteed that there will be no repeated traceability codes in the distributed system, and the identity identification of the enterprise is bound by the signature mechanism, which avoids the crisis of trust in the central distribution of traceability codes and enhances the reliability of traceability.

Description of drawings

Fig. 1 is the schematic diagram of a kind of food collaborative supervision method provided by the present invention;

Figure 2 is a retrospective flow chart of the system of the present invention.

Fig. 3 traces digital assets and health code block structure diagram of the present invention;

4 is a schematic diagram of a method for generating a food traceability code provided by the present invention;

FIG. 5 is a schematic structural diagram of the system of the present invention.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments.

As shown in FIG. 1 and FIG. 2 , a method for tracing a food health code according to an embodiment of the present invention is divided into a traceability part and a collaborative supervision part, the traceability part is the main part, and the collaborative supervision steps and the traceability process steps are parallel;

in,

The retrospective steps include:

Obtain initial traceable product information and initialize the product health code status, and then initialize the current traceable digital assets; obtain digital asset circulation; obtain terminal management and control of digital asset circulation, and cancel the liquidity of a single traceability code;

The collaborative supervision steps include:

Obtain product collaborative quality feedback of traceable products; automatically execute smart contracts according to the quality feedback to control the health status feedback of traceable products.

The following specific instructions:

Among them, the traceback part of the steps are as follows:

S100. Obtain the initialized traceable product information and the initialized product health code status, and then initialize the current traceable digital asset;

Initializing the product health code state includes forming a static data block of the health code block; binding the health code to the same batch of traceable digital assets; initializing the health code block state block. The following is a specific description, as shown in Figure 3, after the service node in the blockchain obtains the traceable product information provided by the manufacturer, it needs to request the CA to verify its legality. For the same batch of traceable products provided by legal manufacturers, check whether the traceability code is double spent. For batches with no double-spending problem in the traceability code, the service node performs hash operation on its basic information to generate the corresponding root hash, and then forms a Merkle hash tree from the root hash of the batch, and generates the hash value of the Merkleroot and the last static data block. The hash value, health code, signature health code, public key of the manufacturer, current version number and timestamp are static data stored in the health code data block by initialization. In particular, the above data cannot be modified after initialization.

After that, bind the health code to each traceable product block data. The pre-binding step needs to verify whether the hash value of its basic information exists in the Merkle hash tree of the health code block. The service node in the blockchain will Qualified traceable product blocks are bound to the health code and the hash value of the current health code static data block, and the circulation state and circulation pool are initialized.

After the two-way binding is finally completed, the service node will initialize the status block of the health code block. In particular, the green code of the health status is generated only by initialization. After completing the appeal step, the service node will broadcast the health code block and the batch traceable product block, and the digital asset will take effect.

It should be noted that Fig. 4 shows the main steps of generating the traceability code by the production node, which is the asynchronous pre-step of S100 under the distributed system. The production node generates a random seed on the local machine, and the seed is injected into the elliptic curve encryption algorithm (SECP256K1) algorithm to generate the public key, and then calculates the traceability code before BASE58 encoding through the SHA256 and RIPEMD160Hash algorithms, and combines the producer's private key for digital signature. , and generate the signature traceability code. The production node will inject the traceability code, the signature traceability code, and the producer's public key into the basic information block of the traceable product.

In another embodiment, there are multiple production workers working on the production line, and the production node selects a group signature method to sign and produce codes.

Further, the CA issues the prefix code of the health code to the incoming production node, and the production node derives the complete health code according to the prefix code. Similarly, the health code is signed to generate a signed health code. After completing the appeal step, the production node submits the information to the service cluster of the blockchain for processing.

S200. Obtain the circulation of digital assets;

Further, after obtaining the circulation request, the service node of the blockchain verifies the information, checks the identity of the distributor, and finally changes the owner of the traceable product, and broadcasts the information to each node.

In particular, for the circulation of a large number of digital assets, the client of the circulation side packages the large batch of digital assets through a batch program, performs batch signatures, and finally submits an application to the blockchain service cluster to complete the outbound operation.

In another embodiment, the distributor conducts batch processing of appeals through a trusted PDA handheld code scanning device or a running water code scanning device. In particular, the CA will mount the device information of the relevant trusted devices provided by the distributor under its role attribute.

S300. Obtain the management and control of the terminal, and cancel the liquidity of a single traceability code.

Further, after obtaining the consumption request, the service node modifies the owner of the traceable product, then cancels the liquidity of the digital asset, and broadcasts the information to each node. In addition, for digital assets whose life cycle ends, the smart contract automatically cancels their liquidity.

In particular, for the case where the health code status is red and the circulation is prohibited, the consumption module and the circulation module will reject the invocation of its circulation request, and the service node will reject the service of its circulation and consumption request.

Among them, the collaborative supervision part is a parallel step in the traceability process, as follows:

T100. Obtain product collaborative quality feedback of traceable products;

The processing of four parallel steps within the step: obtain feedback from consumers; obtain feedback from distributors; obtain feedback from regulators; obtain feedback from inspectors.

(1) To obtain consumer feedback, it is necessary to verify the identity information of consumers and determine the ownership of their digital assets.

(2) Obtain feedback from the distributor, and the service node detects the identity through the CA to determine the ownership of its digital assets.

(3) To obtain feedback from the regulator, the service node detects the identity through the CA, and verifies one of the three conditions: 1) The ownership of a certain digital asset in the same batch; 2) The message jointly signed by the regulator and the consumer or the tester; 3) The signature message of the regulator and the distributor of the digital asset owner.

(4) Obtain the feedback of the tester, and the service node detects the identity through the CA and determines the ownership of the test sample provided by it.

After successfully verifying the appeal information, the service node injects the feedback information into the feedback pool of the health code associated with its digital assets, and broadcasts it to other nodes in the blockchain.

T200. Automatically execute smart contracts according to quality feedback to control the health status feedback of traceable products.

Further, the smart contract weights and accumulates the health outliers of its batches according to the unhealthy feedback of the feedback pool. The contract stipulates three levels of thresholds: regulatory intervention, yellow code warning, and red code stop. When the abnormal value exceeds the appeal threshold, the smart contract automatically informs the supervision node and detects the node according to the agreement; in particular, when the abnormal value accumulates to the red code and stops, its related digital assets cannot be traded normally.

In particular, the contract provides a query interface to facilitate the query of traceable product health, circulation and feedback.

To sum up, the method for food traceability health code described in this embodiment is mainly realized based on blockchain technology and smart contract technology;

At the same time, the present invention also discloses a food traceability health code system. FIG. 5 is a schematic diagram of the architecture of the food traceability health code method provided by the embodiment of the present invention. The system may include: a production module, a circulation module, a consumption module, and a supervisory party. module, the detection module.

The production module is used to manage traceability codes, initialize traceability product information and initialize product health code status;

The circulation module is used to trace asset circulation and product collaborative quality feedback when performing product circulation tasks retrospectively;

The consumption module is used for the management and control of the traceability end, and cancels the liquidity and product quality feedback of a single traceability code;

The supervisor module is used for the supervisor to inquire about the multi-level early warning status products within the system, as well as the information processing and feedback of the primary early warning;

The detection party module is used for the detection process of the detection party in the internal circulation process of the system, as well as the information processing and detection feedback of the secondary early warning.

The following is a detailed description:

The system further includes:

The traceability code structure is used to record the traceability code, the key field information of the traceable product, the associated health code, and the owner of the current traceable asset.

The health code structure is used to record approved health codes, traceability codes of product groups, health status data and status characteristics of product groups.

The traceability code structure further includes that the module can only be initialized by the production module, and cancelled and circulated by the consumption module. Figure 3 is the main description of the traceability code generated by the manufacturer. The approved manufacturer generates a random seed on the local machine, and the seed is injected into the public and private key generator to generate the traceable initial code. Combined with the producer's digital signature, the final traceability code is generated. The generated traceability code is generated by the respective nodes of the producer itself, rather than distributed centrally.

Optionally, referring to FIG. 4 , if the manufacturer has multiple production workers, the digital signature may select a group signature to produce codes.

In the system, the health code structure further includes: the module can only be initialized by the production module authorized by health, and the health status has only green code health access, supervision intervention, yellow code warning, and red code stop circulation. Health level status. The health status is jointly maintained by the circulation module, the consumption module, the supervision module, and the detection module.

In the system, after initialization, the retrospective code and the health code are in a two-way binding state. In particular, the health code has a one-to-many relationship with the traceability code, and cannot be changed after initialization.

The working principle of this system, as shown in Figure 2 is the food safety traceability flow chart provided by the embodiment of the present invention. On the premise of obtaining the health certificate, the manufacturer can call the smart contract to initialize the health code to the green code at the stage of generating the traceability code in the early stage of production; Businesses can transfer the traceable product assets produced to other circulation manufacturers by calling the circulation module.

When the health code status of the traceable product is not red or has not been consumed by the terminal, the circulation module can be allowed to circulate traceable assets under the current role. On the contrary, stop the corresponding retroactive asset circulation.

Consumers can check the health status of their traceable products by scanning the code. When the health code status of the traceable products is not red or has not been consumed by the terminal, the consumption module can purchase the traceable assets and eliminate their circulation. Consumers who have problems using the product can report their unhealthy cases through the consumption module.

The health status pool shown in Figure 2 is the maintenance of the health status of a single batch of products, in which the related roles in the traceability process find and feedback problems will be accumulated in the status pool.

When the warning state reaches the regulatory threshold, the smart contract will automatically notify the regulatory department to intervene. After the regulatory department has verified the situation, if it is confirmed that there is a health problem and feedback the situation through the regulatory module, the health code will automatically turn yellow, and the inspection department will intervene;

When the warning state reaches the detection threshold, the smart contract will automatically notify the testing agency to intervene, and the testing agency will feed back the situation through the testing module based on its testing results. If there is a food safety problem, the health code will automatically turn red and the product cannot be circulated;

When the non-healthy state feedback of the consumer product accumulates to the dangerous threshold, the smart contract automatically turns red, and the same batch of products cannot be circulated within the system.

For secondary processing manufacturers, its operation modules include: production module, circulation module, and consumption module. In particular, the consumption module is used to consume the products of upstream raw material suppliers.

For the detection mechanism, its operation modules include: detection module, consumption module. In particular, the consumption module is used for sample detection processing. In particular, the consumption module includes, but is not limited to, obtaining from consumers, or obtaining from the market when the code turns red.

For a manufacturer, if the number of abnormal health code states exceeds the threshold, the manufacturer cannot call the production module for production, and the system will automatically notify the supervision department to intervene.

Specifically, a system for the collaborative supervision of food health of the present invention, the specific implementation process is as follows:

On the premise of obtaining a health certificate, the production module A generates a health code at the beginning of production, binds the health code with the traceability code of the same batch, and then binds the traceability code with the health code to complete the two-way binding, and finally initializes the health code The status is green code;

B When the health code status of the traced product is not red or has not been consumed by the terminal, the circulation module can be allowed to circulate traceable assets under the current role. On the contrary, stop the corresponding retroactive asset circulation. Among them, signatures are required in the circulation process to trace the transfer of digital assets;

C When the health code status of the traceable product is not a red code or has not been consumed by the terminal, the consumption module can purchase the traceable asset and eliminate its circulation. If there is a problem with the product, the consumer module can report its non-healthy case.

The D smart contract automatically informs the supervision department to intervene. After the supervision department has verified the situation, if it is confirmed that there is a health problem, it will feed back the situation through the supervision module, and then enter the E step of the detection department to intervene.

The E health code automatically turns yellow, and the smart contract automatically informs the testing agency to intervene. The testing agency feeds back the situation through the testing module based on its testing results. If there is a food safety problem, step F;

When the unhealthy state of the consumer product reaches the dangerous threshold, the smart contract automatically turns red, and the products of the same batch cannot be circulated within the system, and the B step of the related product is frozen;

In particular, the circulation module also has feedback authority. When the unhealthy state of the product accumulates to the regulatory intervention threshold, go to step D, when the unhealthy state of the consumer product accumulates to the detection threshold, go to step E, and when the unhealthy state of the consumer product accumulates to the danger threshold, go to step F .

In particular, the accumulation of unhealthy states of consumer products and state changes are coordinated by multiple parties calling smart contracts.

To sum up, the present invention provides a method and system for coordinated supervision of food health traceability, which can alleviate the pressure of scarcity of supervision resources by maintaining the health state pool by multiple parties, and can prevent the identification of products in the first time when problem products appear. Secondary damage caused by the product in question. In terms of probability, it is guaranteed that there will be no repeated traceability codes in the distributed system, and the identity identification of the enterprise is bound by the signature mechanism, which avoids the crisis of trust in the central distribution of traceability codes and enhances the reliability of traceability.

It is understandable that the system provided by the embodiment of the present invention corresponds to the method provided by the embodiment of the present invention, and reference may be made to the corresponding part of the above-mentioned method for explanation, examples and beneficial effects of related content.

As will be appreciated by those skilled in the art, the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions The apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.

The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The recorded technical solutions are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A method for traceability of food health codes, comprising a traceability part, characterized in that: it also includes a collaborative supervision part, and the collaborative supervision process is parallel to the traceability process; in, The retrospective steps include: Obtain initial traceable product information and initialize the product health code status, and then initialize the current traceable digital assets; obtain digital asset circulation; obtain terminal management and control of digital asset circulation, and cancel the liquidity of a single traceability code; The collaborative supervision steps include: Obtain product collaborative quality feedback of traceable products; automatically execute smart contracts according to the quality feedback to control the health status feedback of traceable products. 2. The method for food traceability health code according to claim 1, characterized in that: the product synergistic quality feedback for obtaining the traceable product specifically comprises the processing of the following four parallel steps: Get consumer feedback; get distributor feedback; get regulator feedback; get tester feedback; in, Obtaining consumer feedback requires verifying the consumer's identity information and determining the ownership of their digital assets; Obtain feedback from distributors, and service nodes detect their identity through CA to determine the ownership of their digital assets; To obtain feedback from the regulator, the service node detects the identity through the CA and verifies one of the three conditions: 1) the ownership of a certain digital asset in the same batch; 2) the message jointly signed by the regulator and the consumer or the tester; 3) supervision A signed message between the owner and the distributor of the digital asset owner; Obtain the feedback from the tester, and the service node detects the identity through the CA to determine the ownership of the test sample provided. 3. The method for food traceability health code according to claim 2, characterized in that: said obtaining the product synergistic quality feedback of the traced product, further comprising that the service node injects the feedback information into its digital asset association after successfully verifying the appeal information. in the feedback pool of the health code, and broadcast it to other nodes in the blockchain. 4. The method for food traceability health code according to claim 1, characterized in that: the automatic execution of the smart contract according to the quality feedback situation, the control of the health status feedback of the traceable product specifically includes: The smart contract weights and accumulates the abnormal health values of its batches according to the unhealthy feedback of the feedback pool. The contract stipulates three levels of thresholds: regulatory intervention, yellow code warning, and red code stop; When the abnormal value exceeds the appeal threshold, the smart contract automatically informs the supervision node and detects the node according to the agreement; when the abnormal value accumulates to the red code and stops, its related digital assets cannot be circulated and traded normally. 5. The method for food traceability health code according to claim 4, characterized in that: the smart contract provides an inquiry interface to facilitate inquiries on the health, circulation and feedback of traced products. 6. The method for food traceability health code according to claim 1, characterized in that: said initializing product health code state comprises: Build the static data block of the health code block; bind the health code to the same batch of traceable digital assets; initialize the health code block status block; Specifically, after the service node in the blockchain obtains the traceable product information provided by the manufacturer, it needs to request the CA to verify its legality; For the same batch of traceable products provided by legal manufacturers, check whether the traceability code is double-spend. For batches with no double-spend problem in the traceability code, the service node performs hash operation on its basic information to generate the corresponding root hash, and then the The batch root hash forms a Merkle hash tree, and generates the hash value of the Merkleroot and the hash value of the last static data block, health code, signature health code, production enterprise public key, current version number and timestamp, which are stored in the initialization method. Static data in the health code data block; After that, bind the health code to each traceable product block data. The pre-binding step needs to verify whether the hash value of its basic information exists in the Merkle hash tree of the health code block. The service node in the blockchain will Qualified traceable product blocks are bound to the health code and the hash value of the current health code static data block, and the circulation state and circulation pool are initialized; After the two-way binding is finally completed, the service node will initialize the status block of the health code block. After completing the above steps, the service node will broadcast the health code block and the batch traceable product block, and the digital asset will take effect. . 7. The method for food traceability health code according to claim 6, characterized in that: the acquisition of digital asset circulation specifically comprises, After the service node of the blockchain obtains the circulation request, it verifies the information, checks the identity of the distributor, and finally changes the owner of the traceable product, and broadcasts the information to each node; For the circulation of a large number of digital assets, the client of the circulation side packages the large batch of digital assets through a batch program, performs batch signatures, and finally submits an application to the blockchain service cluster to complete the outbound operation. 8. The method for food traceability health code according to claim 1, characterized in that: the acquisition of digital asset circulation specifically comprises: After the service node obtains the consumption request, it modifies the owner of the traceable product, then cancels the liquidity of the digital asset, and broadcasts the information to each node. In addition, for the digital asset whose life cycle has ended, the smart contract automatically cancels its liquidity. ; Among them, for the situation where the health code status is red and the circulation is prohibited, the consumption module and the circulation module will reject the invocation of its circulation request, and the service node will reject the service of its circulation and consumption request. 9. A system for food traceability health code, characterized in that it comprises the following units: Production module, circulation module, consumption module, supervisor module, detection module; The production module is used to manage traceability codes, initialize traceability product information and initialize product health code status; The circulation module is used to trace asset circulation and product collaborative quality feedback when performing product circulation tasks retrospectively; The consumption module is used for the management and control of the traceability end, and cancels the liquidity and product quality feedback of a single traceability code; The supervisor module is used for the supervisor to inquire about the multi-level early warning status products within the system, as well as the information processing and feedback of the primary early warning; The detection party module is used for the detection process of the detection party in the internal circulation process of the system, as well as the information processing and detection feedback of the secondary early warning. 10. The system for a food traceability health code according to claim 9, characterized in that, further comprising the following units: The traceability code structure is used to record the traceability code, the key field information of the traceable product, the associated health code and the owner of the current traceable asset; The health code structure is used to record approved health codes, traceability codes of product groups, health status data and status characteristics of product groups.

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