What is the ap salary at yonsei or korea vs nus or hku?
Korea is surprisingly low given its high col. Around 45k-50k. HKU pays well around 100k.
Singaporean universities offer a package at about the same as HKU (approx 100k USD). It's important to remember that this includes things like retirement contributions that you'll need to manage yourself (you can't be part of the pension system as a foreigner). COL is high, including expensive housing, schooling for kids, etc (if you're lucky, you get into NUS/NTU faculty housing, which is subsidized).
Taiwan universities are slightly lower than Korea (approx 40k), but have a much lower COL.