I plan to merge Ling Yan

http://hkmdb.com/db/people/view.mhtml?i ... ay_set=eng

with Ha Wai (2)

http://hkmdb.com/db/people/view.mhtml?i ... ay_set=eng

It looks in my opinion (and the opinion of others) without doubts like the same person. One point is her liver spot right below the mouth.

Objections?

How reliable the ID of Ling Yan in "Tough guy"?

The ID is reliable. She is listed as Linda Ling in TOUGH GUY and she is the only main actress in the movie. Another source is one HKFA book with actors identified on the synopsis.

Merged:

??
Ha Wai (2) ?
Aliases: Xia Hui, Hsia Hui

Filmography (1970-1983)

Actor (9 films)
A Cause to Kill (1970) ... Tsai Tsai
The Duel (1971) ... Ling Tze, Factory working Girl
The Man with Two Wives (1971)
The Killer (1972) ... Yu Chiao's Maid
The Devil's Mirror (1972) ... You Lan
The Human Goddess (1972) ... Fifth Sister
Body for Sale (1976)
Centipede Horror (1982)
The Accident (1983)

with

??
Linda Ling Yan

Filmography (1972)

Actor (1 film)
Tough Guy (1972)

Result:

http://hkmdb.com/db/people/view.mhtml?i ... ay_set=eng

That actress

http://hkmdb.com/db/people/images.mhtml ... ay_set=eng

looks also like she could be another alias/real name for Ha Wai.