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Excerpt code: Introduction to qi5n's works: China's wonderful work "TuiBei Tu" was written by Li and Yuan Tiangang in the early Tang Dynasty, which predicted the changes of past dynasties accurately and effectively. Emperor Taizong read this book, appreciated it very much and gave it to Li. Yuan Tiangang bears a grudge because he is jealous of Li's works. After Taizong's death, the two separated the tuibei diagram from the text, and they became feuds.

And the "push back map" has also disappeared from the people. Hundreds of years later, two descendants got married by mistake. ...