http://hkmdb.com/db/people/view.mhtml?i ... ay_set=eng

If nobody stops me in 15 days, I will change his main name to Ko Kou-Min.

I think Ko Yu Min using my Wades Giles converter.
Also, douban, which is usually pretty accurate.
https://movie.douban.com/celebrity/1375220/

OK, Ko Yu-Min.

Thank you.