What contribution did the history of Taoism

Li, known as Daozhi, was born in Shaanxi from 602 to 670, and his ancestral home was Taiyuan, Shanxi. Famous Taoist priest, astronomer, mathematician, yin and yang family in Tang Dynasty.

Li's father, Li Bo, used to be a local official, but later he gave up his official because he was depressed. He once wrote Laozi, ten volumes of local chronicles and astronomical images. These. Undoubtedly, it influenced Li Yisheng's academic orientation imperceptibly.

Li studied Taoism in Tiantai Mountain when he was a teenager, and he was proficient in Taoism, divination, astronomy, calendar, yin and yang and five elements.

Yi Sizhan, his masterpiece handed down from ancient times, is a comprehensive astrological work, in which many lost ancient documents are preserved. In his book, the classification of wind power is clear and scientific, and he is also the first person in the history of the world to classify "wind".

Li predicted that "after Tang III, the hostess would take over the world" when he was trying to manage the classics, calculate the astronomical calendar and make sacrifices to the local chronicles for Taishi. Deeply worried about this, Emperor Taizong asked him if there was such a thing. He said, "I have been in your majesty's palace. He is a relative, and he has been king of the world for only thirty years." Emperor Taizong asked him again, if all suspicious people were killed, would he be spared? He replied, "It's God's will, and people must not disobey it. If the king does not die, he will kill more innocent people. " By preaching the inviolability of destiny, Li stopped the slaughter plan of Emperor Taizong, and Wu Zetian survived. History has confirmed his prediction, so Li and Yuan Tiangang (gāng) are called "Oriental Double Wonders".

Li's contribution to astronomy is enormous. He wrote the famous Book of Jin, Records of Five Elements and Records of Heaven, and sorted and classified the astronomical knowledge accumulated in previous dynasties in a certain order, and compiled a collection of astronomical laws in previous dynasties. At the same time, he made the world's first astronomical observation instrument ── the armillary sphere, which is famous at home and abroad, and wrote an epoch-making taichu calendar in the world astronomical history.

In mathematics, he annotated and revised ten classic works of calculation, and made detailed arithmetic methods and scientific calculation programs for the "formula" and development of mathematics. In addition, he also wrote a book "Qi Ren Ji Yan", which advocated the idea of "co-education of agriculture and Taoism", providing rich information and theories for future generations to study agriculture and mulberry industry. At the same time, it also provides the core and foundation for the practice of "combining agriculture with road" in Doumen.