Chishui River is the only river that leads to the Kaiming Gate of Kunlun Mountain. Legend has it that Kunlun Mountain is eight thousand zhang high, and it houses the Heavenly Emperor's estate in the Lower Realm, guarded by various gods overseeing this sacred palace. There are a total of nine doors in the palace, and the one facing the sunrise in the east is the Kaiming Gate. It is guarded by a nine-headed Kaiming Beast, with steep cliffs that no ordinary person can scale.