Ah Chang was a famous character in the Classic of Mountains and Seas. It was said that he had a wide influence in ancient China. According to the description in the novel Classic of Mountains and Seas, Ah Chang was an outstanding witch who was good at using magic and charms. She once served the Emperor and used her magic and charms to rule the country. But because of her evil behavior, the emperor finally convicted her and exiled her to the ends of the earth.