According to HKFA:

Wong Cheung (3) / (??) http://hkmdb.com/db/people/view.mhtml?i ... y_set=big5
Wong Cheung (4) / (??(4)) http://hkmdb.com/db/people/view.mhtml?i ... ay_set=eng

they are the same person.

Wang Min / (??(1)) http://hkmdb.com/db/people/view.mhtml?i ... y_set=big5
Wang Min (3) / (??(3)) http://hkmdb.com/db/people/view.mhtml?i ... y_set=big5
Wong Man (6) / (??(2)) http://hkmdb.com/db/people/view.mhtml?i ... ay_set=eng

they are the same person.

Can anyone confirm and update?

I do not believe an actor of the 50s is a cinematographer of the 2000s. Wong Man/Wang Min is a very common name in China.