I think Sek Siu-Kin (what is for sure a alias name based on his frequent co-star Sek Kin)

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

is the same person as Tam Wing-Git:

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

They look the same for me. You can also see that Tam Wing-Git was first credited in a movie with action director Chan Siu-Pang. Sek Siu-Kin seems to be a member of Chan's stunt team.

In FOR WHOM TO BE MURDERED is the name Tam Ka-Kit listed - a possible alias for Tam Wing-Git.

Added more images to Sek Siu-Kin and Tam Wing-Git.

Someone objects if I merge the names???

After seeing Sek Siu-Kin also listed as Tam Wing-Git in 36 KILLERS I merged finally the names (main name Tam Wing-Git because that name is more frequent in the credits):

???
Sek Siu-Kin ?

Filmography (1970-1978)

Actor (21 films)
The Chinese Boxer (1970) ... Diao's thug
Vengeance! (1970) ... Jin's thug
Swordswomen Three (1970) ... extra
The Duel (1971) ... Gan's man
King Eagle (1971) ... Lo Brothers' thug
The Comet Strikes (1971)
The Blade Spares None (1971) ... extra
A Man Beyond Horizon (1972)
The Roaring Lion (1972)
The Yellow Killer (1972)
Sonny Come Home (1972) ... extra
Martial Hero (1972) ... extra
Crimes Are to Be Paid (1972)
Death Comes in Three (1973)
Smugglers (1973) ... thug
Stranger from Canton (1973) ... Wong's student
Killer in the Dark (1973) ... extra
Tiger's Claw (1974)
Chinese Godfather (1974) ... extra
Fertility Bank (1975) ... thug
For Whom to Be Murdered (1978)

with

???
Tam Wing-Git
Aliases: Taam Wing-Git, Tan Yung-Chieh
Filmography (1971-2000)

Actor (8 films)
Thirty Six Killers (1971)
Million Dollars Snatch (1976) ... robber
The Smart Guys (1978)
The Legal Illegal (1981)
Stuntmen (1992) ... stunt driver
Time After Time (1992)
Street Kids: Macau Warrior (1999)
Poisen Powder (2000)

Result:

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