Also known by his nickname Kaixin, meaning Happy. He is Zhao Yu's son and Lu Tuan's counterpart on the show. He is half a month younger than Lu Tuan but appears significantly smaller and half a head shorter. He has delicate and petite features that audiences in the original storyline preferred over Lu Tuan. He is shy and intimidated by Lu Chen's aloof demeanor, mumbling a quiet greeting. He receives a fish sausage from Lu Tuan and politely says thank you.
