Li Si, an ordinary person in a small mountain village in the Northeast, by chance, learned the six Ren of the Yin Pan, Da'an, Liulian, Suxi, Chikou, Xiaoji, and Kongming, to determine good and bad luck, find people, find objects, determine directions, and detect ghost traces. Step by step, he led the immortals, established a court, broke the family's debt, and uncovered the secrets of the old immortals in the mountains of Northeast China. He eventually became Mr. Yin and Yang, but he could never be an ordinary person again. (This article involves related knowledge such as Xiao Liuren and Chuma Xian, so those who are interested can read it with confidence)