Mu Nianci gave birth to Yang Guo alone in Niujia Village, and later lived alone with Yang Guo. He was neither rich nor happy, and died about ten years later. When Yang Guo first met the little dragon girl, Sun Popo said with a smile, "This dragon sister is the owner here. You answered everything she asked you! " Yang Guo's first sentence was "Disciple Yang Guo, meet her mother-in-law and aunt Long." He didn't call her sister according to Sun Popo's statement, but called Aunt Zhang Kou. Maybe it's a dialect habit somewhere. In the latter part, regarding the explanation that Yang Guo didn't call you master, Yang Guo said, "I regard you as a master, respect you and value you in my heart, and I will do whatever you say, but I don't call you master in my mouth, just call you aunt." The little dragon girl was shocked again and asked, "Then why?" Yang Guo said, "I worship Taoist Quan Zhen and smelly as my teacher. He was unkind to me, and I cursed my master in my dream. Therefore, it's better to call you aunt, so as not to get you into trouble when I scold Master. 」