Derek Tsang Kwokcheung , is a Hong Kong actor, film director. He is son of Eric Tsang. He directed the film Lovers Discourse and starred in The Thieves in 2012.
Derek Tsang was born to Eric Tsang and his wife onNovember 1979 in Wuhua, Guangdong, China. His father originally wanted to become a soccer player just like his father Tsang Kai, who was Dereks grandfather. But, he ended up pursuing an acting career in 1977 and later moved to Hong Kong when Derek was still baby.
Source: Wikipedia