I am not sure of what you think is left of communism in China, apart maybe from a dictatorship.
Also, the brilliance of China's ruling party calling itself "communist" is that it can effectively thwart any leftist uprising seeking better representation for workers by pretending that they're already in power. For example, unions are outlawed in China because the Party takes care of the working class.
Indeed how brilliant it is, how a government steps all over their citizens rights.