The ancient Chinese calendar also includes the movement of the sun, the moon and the five stars, and the calculation of their positions; Determination of stars and time at dusk and dusk; Forecast of solar and lunar eclipses, etc. To some extent, the ancient Chinese calendar is a work of compiling astronomical calendars. It includes many important contents of ancient Chinese astronomy and is the crystallization of ancient scientific observation and research.

The Yellow Calendar, also known as the Old Yellow Calendar, is a folk perpetual calendar based on the lunar calendar with daily taboos and good or bad luck. The Yellow Calendar includes astronomical meteorology, seasonal seasons, and some good or bad luck and taboos that people should observe in their daily life. It is also called the Imperial Calendar because it is issued by the Imperial Celestial Supervisor and the emperor. Another is that the Yellow Calendar was created by the first ancestor of Chinese culture, the Yellow Emperor, so it is called the Yellow Calendar. The Huangli website Huangli contains professional contents such as daily taboo, daily auspicious time, Gregorian lunar calendar, Ganzhi, Nayin, twelve gods, duty, foetus god, Peng Zubaiji, auspicious god and evil spirit, position of god of wealth, position of god of joy, position of god of honor, position of god of blessing, etc.