Peter Yang Kwan, also known as Yang Qun (Chinese: 楊群; born September 25, 1935), is a retired Hong Kong martial artist film actor, film producer and director, best known for his appearances in Hong Kong action cinema of the 1970s and 1980s. Peter Yang Kwan, also known as Yang Qun (Chinese: 楊群; born September 25, 1935), is a retired Hong Kong martial artist film actor, film producer and director, best known for his appearances in Hong Kong action cinema of the 1970s and 1980s.