As with many "Road Movies" this is also a "Buddy Film". Only, the buddy is a very "silent partner". "Weekend at Bernie's" and "The Trouble with Harry" spring to mind, but our friend does not nearly play such an active role as Bernie or Harry - though he does provide the reason for being on the road.
Travelling with our buddies through China on the way to the Three Gorges really has the feel of being on Route #66, China. I felt like I was looking over Charles Kuralt's shoulder whenever there was yet another vignette of rural China. Wheather true or not, I come away with the belief I know/understand these people of the earth. The touching and moving parts of the film are meant to tug at our heart-strings but do not feel contrived. That so many of the commenter's express how beautifully the film shows "their" China, I am convinced that such hardships are typical there.
Yet, with all the sadness, this is a "feel good" movie. Life goes on, tomorrow is another day, and our journey's end is just down the road a bit.