Huang Li, also known as the old Huang Li, the emperor calendar, is produced on the basis of the Chinese lunar calendar, with a perpetual calendar of daily good and bad. The Huangli legend was created by Xuanyuan Huangdi, so it is called the Huang Li. The main content of the Huang Li is 24 solar terms, daily taboos, dry branches, value gods, stars, moon phases, and fierceness.