Knocking on the Door of Tiantang

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4P, fattening......

😃 Come on and update, wait and see! Is there anything else delicious? Let's serve it quickly! 😁

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Did the author make a mistake about the number of days in a year in the lunar calendar?

There was no multiplication and division in the Tang Dynasty? ? ? China used the "Nine-Nine Formula" earlier. Sentences such as "three-nine-twenty-seven", "six-eight-forty-eight", "four-eight-thirty-two", and "six-six-thirty-six" can be found in books such as "Xunzi", "Guanzi", "Huainanzi", and "Warring States Policy". It can be seen that as early as the Spring and Autumn Period and the Warring States Period, the "Nine-Nine Multiplication Songs" had already become popular. "Zhou Bi Suan Jing", formerly known as "Zhou Bi", is an ancient astronomical work that explains the theory of Gaitian and the four-part calendar. Since astronomy and calendars require mathematical calculations, the book contains many mathematical contents, such as multiplication and division of fractions, finding common denominators, and the Pythagorean theorem.

Why are there always people like this? Try using modern Chinese Pinyin to spell Hakka.