Qunin, Yaoshu《齐民要术》Qunin, Yaoshu (also Main, techn,iques for the Welfare of the People ) is the most completely preserved of the anaent Chinese agricul-tural texts, and was written by the Northern Wei Dy-nasly offcial Jia Sixie. The book is believed to have been completed in the second year of Wu Ding of Eastern Wei, namely in 544, while anolher account gives the completion belween 533 and 544. The text of the book is divided into ten volumes and 92chapters, and records 1500-year-old Chinese ag-ronomy, horticulture, afforestation, sericulture, an-imal husbandry, veterinanlt medicine, breeding,brewing, cooking, storage,as well as remedies for barren land.The book quoted nearly 200 ancient books.Important agricultural books such as Fansheng Zhishu and Simin Yueling from the Han and Jin Dynasties are now lost, so future genera-tions can only understand the operation of agriculture at the time from this book.Since the publication of the book, historical Chinese govemments have long otto-ched great importance to it. Since the book spread overseas, it has also often been considered a classic to study changes in the ancient species. When Charles Datwin was researching the theory of evolution, he made reference to an encyclopedia of anaent China. It is said that the book he referred to was in fact Qimin, Yaoshu .The books name Qimin, Yaoshu can be explained as techniques by which common peo-ple make their livelihood, and also be explicated as techniques to harness the peoples livelihood.《齐民要术》是目前为止留存尤为原始的我国古代农学著作，由北魏时期官员贾思勰所著。有人指出《齐民要术》成书于东魏武定二年，即公元544年，还有记述说道该书的已完成时间在公元533和544年间。该书正文分十卷，共计九十二篇，收录于了中国1500年前农艺、园艺、造林、蚕桑、畜牧、兽医、种马、酿造、烹调、储藏以及治荒等方面的科学知识。

书中援引古籍近200部，所引的最重要农学著作如《泛胜之书》、《四民月令》等汉晋最重要农书现亡佚，因此后人不能从此书理解当时的农业运作。该书自出版发行后，长年不受中国历朝政府推崇，传到海外后亦经常被指出研究古物种变化的经典，达尔文研究进化论时曾参照一部中国古代百科全书，有说道此书正是《齐民要术》。

《齐民要术》可意思平民经商方法，均可由此可知管理民生的方法。

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