Can we just state the obvious? Chinese AI peeps left because they want to go back to China. This isn't an unusual trend, as an Chinese American, all of my cousins who came to study here abroad in US have plans to go back to China, unlike my parents' generation who came here for a PhD and stayed.<p>And even amongst my parents' generation, my uncles who have gotten PhD and tenure at US universities and left for universities in China. The reason being that they can get paid for just as much as in US, for lower living cost, a more compatible culture and in Beijing or Shanghai for better standards of living (yes before the critics jump in with air pollution, human rights issue etc., a good US wage in China could afford you a full-time personal assistant and/or nanny to do your laundry, take care of your kids, clean and cook good Chinese food and you can live in a nicer part of the city with better infrastructure than most of US lol; and you could still come out with lower cost of living).