Er Zhuzhu is Liu Laogen’s godson.

Er Zhuzi is a character in the TV series "Liu Laogen", "Liu Laogen 2" and "Liu Laogen 3", played by Zhang Xiaofei in the play. Er Zhuzi, whose real name is Zhang Erzhu, is the leader of the Longquan Villa small theater troupe and Liu Laogen's godson. He once had a relationship with Liu Shanxing.