I want to merge in a few days if nobody objects that two names:

Chan Yat-San (1)

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

with

Chan Yau-San

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

In "Mighty One" and "Love Competition" Chan Yau-San is listed in the cast list as Chan Yat-San.
HKFA also says that Chan Yat-San is the alias of Chan Yau-San:

http://ipac.hkfa.lcsd.gov.hk/ipac20/ipa ... i=13#focus

Done. See the result:

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