Cai Xiaoyun is a young woman from the village and a friend of Jiang Tiantian. She is married to Cha Zhijie and is the daughter of Uncle Cha San. She invited Jiang Tiantian to witness her family's sheep giving birth. She is described as being in high spirits during the lamb birth and is caring towards Jiang Tiantian, offering to let her visit Shaobing anytime. She is portrayed as a warm, friendly villager who shares in the joy of the newborn lambs and is amused by Jiang Tiantian's excitement and emotional reactions.
