The Chinese move to the cities for the higher-paying factory work because THAT IS THEIR OPTION. Not unlike the mass migrations from the south to the northern factories in the US after the Civil War.
Would you rather have a factory job or continue to do this for a living as your ancestors had done for hundreds of years? I lived in the hinterlands of China for seven months among peasants like this and it is not a good way to live.
I remember a quote, I don’t remember if it was Slate magazine, about how the work in an Asian factor was the second worse thing the writer had seen. Asian agriculture was the worst.
Factory workers were in air conditioning and protected from the rain, didn’t have bugs in their faces, weren’t working in mud, got paid money for their work that helped their families. In all, people WANTED to work in the factory because the farm was so bad.