You must be mistaken. China's Constitution matches exactly with daily life in China. Of course there's a way to challenge unconstitutional actions, through the Communist Party member dispute process where you can escalate to each level of political officers in the township you live in.

If you go high enough, you might get personal attention from the regional or even provincial governors, who also have to make sure they have enough food, water, shelter, jobs, and prisons to fit the population of their jurisdiction.