Gu Taotong Xuan

Xuan is the creation of heaven and earth. It is contained in heaven and earth and is called Qi. Mysterious and mysterious, there are many wonderful doors. In ancient times, there were powerful people who used it to catch the stars and the moon, and to travel around the sky. Later, there were those who came to thank Wuyi, who regarded the common people as a furnace, and all living beings as insects, and they used Gu Dao to gain access to the mysteries.