The three-year-old little girl of the Qin family with a big snow-white tail was pushed by her greedy uncle to marry the sick and weak prince, and became the youngest princess in the East Palace. This mythical beast's tail is constantly causing trouble, but it has also become the strongest backer. He denounced his relatives, tripped up his aunts, and protected the prince by seeing through his aversion to victory. He even plucked his tail hair and made it into an amulet to save the prince's life. She used animal-like intuition to distinguish between good and evil, and relied on her natural power to help the prince secure his throne, but in the end she could not keep him who was suffering from chronic poison. After the death of the prince, she had her hair cut and was buried with him. She followed the Taoist priests to practice immortality, and eventually became a snow-capped mountain fairy. She guarded the country for thousands of miles in the Great Zhou Dynasty, facing the brightest star in the sky every day, wagging her tail and waiting for her old friends to meet.