Lau continued acting in Hong Kong dramas and started to gain fame locally. In 2000, he starred in youth romance drama "Aiming High" with Nicholas Tse. He also had a supporting role in epic financial thriller "At the Threshold of an Era". From 2001 to 2002, he starred in the historical sitcom with his father in "Virtues of Harmony" and later its sequel Virtues of Harmony II in 2003, which had a modern twist. In January 2005, he starred in modern comedy drama "My Family", in his first leading role.