Mysteries of the Tang Dynasty

Lin Fan, a college student in the Department of Modern Mathematics, died unexpectedly while studying ancient arithmetic classics. He was reborn as Li Yan, an orphan during the Zhenguan period of the Tang Dynasty, and was accepted as a direct disciple by metaphysics masters Yuan Tiangang and Li Chunfeng. Armed with modern scientific knowledge and limited ability to predict history, he has become a special being who wanders between the court and the world. From Qintian monitoring and calculation to dragon vein parade, from cracking the palace curse to fighting against the secrets of the Western Regions, Li Yan innovated the metaphysical system with "mathematical yin and yang" and resolved crises many times. He struggled to balance the prince's rebellion, clashed with the fate of the young Wu Meiniang, and even achieved the fusion of Chinese metaphysics and foreign secrets during the Western Expedition. However, as his status rose to the rank of National Master, he had to face the cruelest choice: when he had predicted the Anshi Rebellion but was limited by the secret of heaven, how to protect the fate of the Tang Dynasty with the conscience of modern people? This is a collision between scientific thinking and thousand-year-old metaphysics, and it is also a legend of a time traveler protecting a prosperous age in the torrent of history. Li Yan eventually became one of the secret creators of "Tui Bei Tu". His influence of integrating ancient and modern theories lasted for thousands of years, but his name was always hidden behind the glory of the prosperous Tang Dynasty - until it became an eternal legend. (The entire series runs through the integration game of traditional arithmetic and modern science, and the difficult choices between destiny and personnel, and unfolds a magnificent picture of the metaphysics of the Tang Dynasty in a grand narrative of 1.5 Million words)