Liu Yifei, Gong Li and Donnie Yen were nominated by Disney for the Oscar. Why are many stars of foreign nationality?

In fact, I personally think that stars are foreign nationals, which is their right to choose, and we can't interfere. But many stars choose foreign countries because they want to make their children's lives better. These are also what every parent wants. It's just that the choice of a star is to change nationality.