"The Big Dipper Classic" is a Taoist classic, and its full name is "The True Classic of the Feast of the Core Monument of Emperor Tai Shang Ling Xuan's Life in the North". It is included in the article "orthodox Taoist scriptures", and the full text is about 6 thousand words. The classics of the Big Dipper can be roughly divided into six interpretations: Tai Shang Huang, Ling Xuan, the Big Dipper, Life Core Monument, Feast and Zhen Jing.