Just a quick clarification. There is no formal “tenure” system for faculty members here in Taiwan. Currently those who are at the associate professor level or higher typically have some job security (you might call this de facto tenure), but even faculty members at those ranks are (at least at my institution and other places I know about) subject to scheduled reviews. AND for those working at universities near the bottom of the ranking pile, it is also a possibility that one’s department or even the whole university could be shuttered. More on this here:
The key in all this is do good work, meaningful work. If you’re good at your job, there will be opportunities somewhere globally.
Guy