https://hkmdb.com/db/people/view.mhtml? ... ay_set=eng
Maybe there are really credits that call him like that, but I couldn't find any. Obviously it's supposed to be Mandarin, but 場 should be spelled Chang, not Chiang.
If no one objects, I will rename him to Ma Chang in next weeks. I will keep Ma Chiang as an Alias.
EDIT:
Done.