I rode (on) subway and bus often in metropolitan Taipei.  During peak hours, most of the time younger people would yield seats to me, especially those priority ones. My principle is like this: I would take the priority seat with thanks to the gentlemen or the ladies, but decline the non-priority one with "no, thanks".  Even I am a senior of seventy plus now, still I will yield my seat to those passengers who are in need of a safer riding, for examples, pregnant women or people carrying infants. 

A college classmate of mine once said one of the things he hated most was people yielding seats to him on buses and subways.  He thought he was still too hale and hearty to let other passengers yield seats to him, and he said that kind of "kindness" would make him feel uncomfortable and embarrassed.  Regretfully, he died of stroke early this year.  Rest in peace, Professor Liu. 

Attached below please find a report that some celebrities, incumbent or retired high-rank officials of China Mainland are found in riding subways.  I guess rarely can we find similar scenes in Taipei. 

https://www.guancha.cn/society/2018_11_07_478611.shtml