The ancient name of the South Tianmen Gate is Tianmenguan. Because the ancient Taishan represents the heaven, the top of Mount Taishan is the location of the heavens. There are four heavens in the east, west, south and north. This gate is south, so it is called "Nantianmen", but also the main entrance of Tianting, directly to the Lingyu Temple of the Jade Emperor, on the top of the nine heavens (one said to be 36 heavy Nantianmen, below is the southern support of the continent, is the eastern Tang Dynasty, the land boundary of the Chinese power. To the west, it is Xitianmen, and the West Sea below is Xiniu Hezhou. There are monsters walking around, located in the desert, everyone is facing the Buddha. To the north, it is Beitianmen, and the Beihai below is Beiju Luzhou. It is not Zhoushan. At that time, the work together was angry and touched Zhoushan, and the sky collapsed, so that the myth story of son-in-law to make up for the sky was introduced. To the east, it is Dongtianmen, and the East Sea below is Dongsheng Shenzhou. It is a fairy island, and there are ten continents and three islands. That fairy island is the Dongfu where Sanxian lives. According to the Shanhaijing, the original fairy islands are carried by the sea turtles. They were caught by a giant country and sank two turtles. The remaining one is called Penglai, and the giant kingdom has been punished for violating the emperor of heaven because of this matter, and the body has been reduced to the size of ordinary people. In many myths in China, Nantianmen is mentioned, such as "Journey to the West", "Eight Immortals Crossing the Sea", "Fengshen Performance", "White Snake", The Nantianmen have been mentioned many times in mythological stories such as "Where is the sea" and "Baolian Lantern".