Chapter 22 6. The Wei and Jin Dynasties

Mathematics in the Wei and Jin Dynasties was very good.Liu Hui of the Wei and Jin Dynasties proposed the correct method for calculating pi, and Zu Chongzhi of the Southern Dynasty calculated pi to seven decimal places, which is the world's best achievement. In addition, he is the author of "Zi Shu".Mathematics in ancient China was at best at the level of the current elementary school seniors, fifth and sixth grades, because algebra was not invented, and algebra was learned from foreigners. In terms of agronomy, Jia Sixie wrote "Essentials for the People of Qi".It has three characteristics:

The first is emphasizing agriculture and suppressing business. "Abandoning the basics and chasing the last is what the sages do. The rich and the poor, the hunger and cold, so the businessmen are not recorded." I don't write about business and business, which is agriculture and business at the end.If you abandon agriculture and do business, you will lose everything. The second is to systematically summarize the agricultural and animal husbandry production experience in the middle and lower reaches of the Yellow River before the sixth century.The Han people are farmers, so how can they record their pastoral production experience?Because of the great integration of nationalities during the Wei, Jin, Southern and Northern Dynasties, the minority nationalities taught it.

The third is the earliest and most complete agricultural book in existence.China is based on agriculture, and it has been farming since the Xia Dynasty. It is impossible to write a book on agriculture after three thousand years of farming at this time. It is impossible, and it must have existed before.So of course there are agricultural books earlier than "Qi Min Yao Shu", but they are not complete.For example, the "Monthly Order of the Four Peoples" of the Eastern Han Dynasty was incomplete. The achievements in geography include Pei Xiu's "Yugong Regional Map" in the Western Jin Dynasty, and Li Daoyuan's "Shui Jing Zhu" in the Northern Wei Dynasty. "Shui Jing Zhu" is beautiful in writing and practical in content. Later, it was used by Chinese painters of all dynasties as a classic treatise on the study of mountain veins. Lu Yanshao, a master of Chinese painting, liked "Shui Jing Zhu" very much. It is quite powerful.

In terms of literature, there is the earliest gossip magazine in China.But unlike the current gossip magazines, the paparazzi have nothing but shame and legs. The literary style of that set of books is outstanding, and the value of literary ideas and historical materials is particularly high.In addition, there are "Seven Sages of the Bamboo Grove" who represent the character of the Wei and Jin Dynasties, the first celebrity to run naked.