[luyu_wu]

It's not easy to leave a tenured position you worked half your life to get to I suppose...

[lucubratory]

From what I understand the PRC tries pretty hard to provide a lot of incentives to academic returnees. I do wonder if they have a tenure match program, where if you have tenure at an American university of a given calibre you are automatically granted tenure at a Chinese university of a similar calibre if you return to China. They probably should.

[Andrex]

If that's true, then that seems to be the simplest explanation for what happened here? (Honestly asking.)