A slightly chubby young man in the hutong who is friends with Cao Bingkun and Xu Zitao. He is the nephew of Wang Mingsheng, deputy director of the bread factory. His father is Liu Aihua, a school's dean of academic affairs who is strict and physically disciplinary. Liu Changyun is talkative, humorous, and somewhat cowardly but loyal to his friends. He led Zhou Yuwei to the bread factory, which inadvertently led to the egg supply business opportunity.
