Do you mean there are no corporations in China or that the government controls them there? Do foreign corporations operate (and pollute) in China? Could the comment not be applied to corporations anywhere on the planet?
Look read up on communism any corp foreign or domestic operating in China has but one master the government of china
China allows the pollution because the government doesn't care about its people only its political and economic power
If you're really worried about pollution in china which I doubt you are then at least blame who is really at fault