i added a couple more pictures to identify

http://www.hkmdb.com/db/movies/images.mhtml?id=6998&display_set=eng

http://www.hkmdb.com/db/movies/image_de ... ay_set=eng

could be Lui Siu-Ming (2):

http://www.hkmdb.com/db/people/view.mht ... ay_set=eng

I'm not sure if your Leung Hak-Shun ID is correct.