Kent Cheng Jak-Si
Kent Cheng Jak-Si (Chinese: 鄭則士, born 22 May 1951) is a Hong Kong film and television actor. He is a two time recipient of the best actor award at the Hong Kong Film Awards.
Known for
Ip Man 3 
Ip Man 2 
Ip Man 4: The Finale 
Once Upon a Time in China 
Flash Point 
The Prosecutor 
Crime Story 
The Bodyguard from Beijing 
Chasing the Dragon 
Sex and Zen 
The White Storm 2: Drug Lords 
Once Upon a Time in China V 
Cesium Fallout 
Dr. Lamb 
Run and Kill 
To Be Number One 
The Stunt Woman 
The Leakers 
The Imp 
Once Upon a Time in Hong Kong 
A Hearty Response 
Sentenced to Hang 
The Brotherhood of Rebel 
The Most Wanted 
The Log 
Legend of the Brothers 
Gui ma bao biao zei mei ren 
Those Were the Days... 
Who Is Undercover 
Hong Kong Graffiti 
All U Need is Love 
Chuo tou wang 
I Did It My Way