The pay scale is the most pragmatic consideration. Taiwan's professors earn an average monthly salary of NT $ 100,000, while Hong Kong's get HK $ 100,000, which is four times higher. There was a case of an NTU College of Management professor who was hired away from a famous university in the US but who was then lured away by the University of Hong Kong.
待遇制度最現實，台灣教授的平均月薪約是十萬元，香港則是十萬港幣，比我們高四倍，台大管理學院就發生過從美國名校請回來的教授，後來又被香港大學挖角的例子。