LOL at the US being brain-drained by China. They're more racist than we are, they aren't going to import anyone who isn't ethnic Chinese in any significant numbers. Certainly they'll never import Bob for anything, space station work or not. Do you suppose he's still trying to learn Mandarin? I haven't seen him mention it in a while. My guess is not, tonal languages are notoriously hard for people whose native language was not also a tonal language. Also trying to learn the thousands of written characters hurts Bob's tiny brain. He'd never manage, and the Chinese would have no use for him even if he did.