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