These numbers are manipulated! The main aim of the communist party is to maintain a great image of China infront of the world. But the reality is very different that what you are seeing here.
A good read:
https://www.cfr.org/article/chinas-homegrown-crisisI personally work with 17 Chinese colleagues who are doing the same job since last 18 years without changing the company and with only one promotion. They are afraid of changing jobs as there's not much opportunities available outside the metro cities and it's extremely costly to live in metro cities. Do not believe things coming out of China glorifying themselves.
If China, is maintaining a great image it itself in front of the world but have a different reality inside, then they're doing a great job in concealing what really happens in their country. I say this because, the impact of China, to the whole world in terms of manufacturing can not be overemphasized. I believe that there is hardly a home in the whole world where you will not see a Chinese product inside. China, is among the world power and has a robust economy as far as I can see, although I've not been to the country before, but I feel the impact of their economy because of there massive exports to other countries.
I must applaud China, because it's not easy for a country of over one billion people to sustain it's economy and still have surplus to export to other countries. So with that kind of population explosion, it's to be expected that it won't be easy to switch jobs, in fact if not for their industrialization, they're supposed to have the highest number of unemployed and restitutes in the world, because of their explosive population.