I think it is a bit overcomplicated / subjectively analysed.Second link from the top, Professor Steve Hsu states:
Prediction: PRC share in all 3 categories will increase in coming decades as their K12, undergraduate, and graduate schools continue to improve, and their high-tech economy grows much larger. See
Using conference papers as the filter probably misses a lot of world class work (especially implementation at scale) that is going on in PRC at tech companies. Note in the list below the only Chinese institutions are Tsinghua and Beijing universities. But I would be surprised if those were the main accumulation of top AI talent in China, compared to large tech companies.
I think it is a bit overcomplicated / subjectively analysed.
The emigrant learners in the USA has to have money to finance the school from they own/parents pocket, and they consider the USA schools as good investment ,regards of later wage and immigration prospect.
After graduation , due to the high investment they want the highest paying jobs - and that happens to be in the USA again.
To change it China needs to improve the income opportunity for the Chinese university graduated persons, including but not limited the non monetary compensation , like long term stability and freedom enjoyed by the USA citizens/permanent residents.
Lot of student and family consider the USA university as an expensive, but sure path for emigration .