Qi Men Dun Jia is an ancient Chinese magic number, known as the "study of emperors", integrating the knowledge of Yixue, astronomy, laws and calendars, geography and other knowledge. It builds a prediction model with a unique symbol system. The core elements are three oddities and six rituals, eight gates, nine stars, and eight gods. The three oddities, Yi, Bing, and Ding, symbolize special energy; the six instruments, Wuji, Geng, Xinrengui, and the heavenly stems and earthly branches construct the time and space coordinates. The eight gates correspond to different states. If the gate owner is not in peace, the gate owner will be in wealth. Each of the nine stars has its own characteristics, and the Canopy Star represents adventure. The eight gods assist in judgment, and the value symbol symbolizes authority.
Its starting point is divided into Yin and Yang escape, from winter solstice to awn, use Yang escape, from summer solstice to heavy snow, use Yin escape. Each element is arranged according to specific rules, simulating the laws of the universe, and used to predict fortune and guide decision-making. Although it is full of mystery and some of its contents are difficult to explain scientifically, it is an important part of traditional culture, carries the wisdom of ancients, has far-reaching influence in military, folklore and other fields, and attracts people to explore its mysteries.