That's a stretch. They don't really make much sense in their sentence formation but it sounds like they said: (western) leftist criticism of China's state of sustainability is "greenwashing" and an aid for imperialism.

I agree in the end any criticism can aid the us. But what do you do? Shein exists, and is bad. It is mandatory for all communists to criticize it.

But what does greenwashing have to do with anything. Criticizing fast fashion is not greenwashing. Sounds like Israeli.