Yun Chi's magnificent performance alone makes it well worth the watch.
The story revolves around the life of a young lesbian girl from the Chinese working class. While this is relevant and well portrayed throughout the entire movie, giving us a well-crafted image of the social context of contemporary China (and many other societies as well, which in this globalized world are not so different in terms of social stratification), I think none of that is the focal point of the movie.
The focal point, I would say, is Meili's character as a fragile human being, broken by the weight of an absent family and an array of toxic relationships, all of that reinforced in the context of the society in which she lives in and a life with no financial security.
In the end, the realization that Meili's history and deteriorating mental health are far too real in our world, brings a sense of sadness and empathy towards the character.