RE: They must just really like us.
I can’t tell who is or isn’t a spy, but I do know that getting into China’s universities is a touch nut to crack. The Chinese “Gao Kao” system is designed to eliminate all but the best ( or the luckiest ).
The other alternative is for those unfortunate enough not to have gotten through the tough entrance exam filter is to study abroad. In here there are advantages — good universities ( especially STEMs ) and chance to master the English language <— a DEFINITE advantge in China.
Singapore, China, Korea, etc dominate while young, but fade away.
America has a unique ability to allow people to find their own way and succeed.
I studied a broad in college. Good times.