This actor appeared in a couple of movies produced by Tam Bing-man and Lee Heung-kam. In another one of their movies, we have a similarly-named actor credited: http://hkmdb.com/db/people/view.mhtml?id=67580
I think this credit was added from the HKFA since they record the same name. The credit in the movie itself is almost completely cut off due to the pan-and-scan transfer:
but it certainly looks like a 伊, not 尹. Any objections to a merge?