In the late 1990s, Yu began appearing on television. In 1998 he appeared in one episode of The Sentinel. In 2001, he was the voice of the Cook in several episodes of the PBS children’s animated series, Sagwa, the Chinese Siamese Cat and also in an episode of Dark Angel. From 2002 – 2004, he appeared in three episodes of Da Vinci’s Inquest. He was seen in one episode of Gather Up Little People episodes of Dead Like Me in 2003, two episodes of The Dead Zone in 2003 and 2004, as well as playing the Chinese son in the film Spook in 2003.