Why are so many China stars American?

I think it has something to do with their work. They often go abroad (or Hong Kong, Macao and Taiwan), and Chinese mainland's passport is the most difficult to use in the world. Ordinary citizens' passports are almost zero visa-free (very troublesome, even going to Zhuhai requires a visa! ! ! ! ! Procedurally speaking, it is more troublesome. Some people call mainland passports junk passports. There are many mainland stars who immigrate to Singapore, and there are more than 80 visa-free countries in Singapore. There is also the low personal income tax that the rich like, and of course there are welfare, children's education and so on. Of course, American passports also have many advantages. It seems that 120 countries (including regions) are visa-free.