Who told you that "600.000" Chinese students are even willing to come to the USA??? especially upon reading up on posts such as from MAGA dolts or Lefty/Lib propagandists - your liar in chief, right?
Even in 2015 there where just about 310,000 Chinese students in the USA. - thanks to TACO down to 266,000 in 2025.
The total of 704,000 Chinese oversea students in 2019 went back to around 570,000 in 2025.
China is the future and therefore Chinese students practice future tools - which is online studies. Whatever else the government wants to know - they simply hack into others computers and networks or get foreign high-tec companies to invest in China.
If you want to see the future in action, spend two weeks in China.