According to the animation Crimson Lotus and the Ice Goose, we can roughly outline the ancient plot setting. Imperial concubine, former daughter of Xuan Nv in Kunlun. Gu and his mother Gu were once exiled to the Moon Country, and later returned to the Infinite Empire. Gu was assassinated by Ning Hongye, which caused Gu and Ning Hongye to turn against each other.

Gu de's story

The East Palace incident mentioned in the background story of Yueshan Mountain refers to the Qi King, that is, the eight princes of the infinite empire, who suddenly claimed that the prince harbored witches and attempted to usurp the throne. Then, with the acquiescence of the emperor, the Eight Princes led an army to raid the Prince's Mansion. After a big fire, all the people in the Prince's mansion disappeared or fled, and Gu was burned to death in the fire.

Therefore, we can infer that Gu's true identity belongs to the Crown Princess. After Gu defected from Kunlun, she somehow became the crown princess of the infinite empire.

Gu is Gu's great-granddaughter, the prince of the infinite empire. Gu's father is the prince of the infinite empire, which has been confirmed in the above-mentioned changes in the Eastern Palace. However, Gu's sentence "Cui Jiazhong is righteous, and Han Qing and his son should bear it in mind" is quite doubtful. Does the "father" here refer to the father of the prince and the emperor at that time? I think it's obviously not, it should refer to the prince.