Martial artist, actor and director who became known for his roles in the 2008 film Ip Man and the 2002 film Hero. He won three Awards for Best Action Choreography from 2003 to 2006 for the films The Twins Effect and Kill Zone. In 2016, he played Chirrut Imwe in Rogue One.
He studied T'ai Chi and breakdancing as a teen. He made his debut film appearance as a stuntman in 1983's Shaolin Drunkard.
He wrote, directed and starred in the 2007 film Legend of the Wolf.
He married his second wife, Cecilia Cissy Wang, in 2003. He was previously married to Zing-Ci Leung from 1993 until 1995. His younger sister is actress Chris Yen. He has two sons named James and Man-Zeok and a daughter named Jasmine.