Han Shu Yi Wen Zhi is the earliest catalogue of historical records in China, which belongs to one of the top ten records of Han Shu. When Ban Gu wrote Hanshu in the Eastern Han Dynasty, it was the best collection of books of Ji surname and the Western Han Dynasty, which was adapted from the Seven Laws. It is divided into six arts, hundred schools of thought, poetry, art of war, mathematics and folk arts, with 38 books, 596 volumes, 13269 volumes. In Qilue, Ban Gu claimed to "delete its essence to prepare for the article" and became Hanshu Yiwenzhi.
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By the time of Emperor Wu of the Han Dynasty, books were incomplete, bamboo slips fell off, etiquette was destroyed, and rituals and music were destroyed. The emperor sighed in shame: "I am worried about these things!" " "So a simple book collection strategy was established, and officials who copied books were set up, all of which were enriched to the secret room until the legends of various philosophers. When Emperor Han became emperor, due to the serious loss of books, Chen Nong, an admirer, was sent to various places to collect scattered books. Liu, a doctor of Guanglu, was ordered to preach the poems of various schools of thought, serve as a captain of infantry, preach the book of divination of Yin and the book of medicine of Li.
After learning a book, Liu Xiang sorted out the contents, summarized the main idea, recorded it and played it to the emperor. After Liu Xiang's death, Emperor Ai of Han sent Liu Xiang's son to serve Liu Xin, the captain of the car service, to complete his father's career. Liu Xin summed up all the books and presented Seven Outlooks to the emperor, so there were Jilue, Six Artistic Outlooks, Zhuzi Outlooks, Poems and Lyrics, Military Outlooks, Shu Shule and Ji Fanglue. Now select the main part. Thereby making the collection more complete.
Baidu encyclopedia-HanYueFu