http://hkmdb.com/db/people/view.mhtml?id=59907
http://hkmdb.com/db/people/view.mhtml?id=97008
Looks like the same person. Different last name but same pronunciation.

If nobody stops me in 15 days I will merge them.

Merged

???
Ku Chung-Hin

Filmography (1999)

Writer (1 film)
To Nail the Killer with All Efforts (1999)

and

???
Gu Zhong-Xuan

Filmography (1996-2000)

Director (1 film)
She Xie Nu Ren Xin (2000)
Actor (1 film)
Beauty Is Not Bliss (1999)
Writer (3 films)
Tao Se Jiao Yi (1996)
Qing Yu Shi Jie (1997)
Beauty Is Not Bliss (1999)