Academic life in China
I think you have a few important questions.  Foremost, I am assuming you know the language -- to what extent do you know Chinese culture?  The transition will be very steep if you do not understand the cultural nuances of all aspects of living and working in China.  Indeed, from a Western standpoint, the interactions between students and faculty are much different.  And, the interactions between faculty and staff are also different.  As you consider the options, I would find out what criteria are used for promotion, and whether you must publish in certain journals on certain lists.  I don't know where you have done your training.  If your training is in a Western university, you may experience a very steep transition if you are unfamiliar with Chinese culture, practices, and norms.