From a New York Times story by Li Yuan headlined “China Is Suffering a Brain Drain.
The U.S. Isn’t Exploiting It.”:

They went to the best universities in China and in the West. They lived middle-class lives in Beijing, Shanghai and Shenzhen and worked for technology companies at the center of China’s tech rivalry with the United States.

Now they are living and working in North America, Europe, Japan, Australia — and just about any developed country.

Chinese — from young people to entrepreneurs — are voting with their feet to escape political oppression, bleak economic prospects and often grueling work cultures. Increasingly, the exodus includes tech professionals and other well-educated middle-class Chinese.