In a word, "book collection" is characterized by "erudition and importance". Wei Zhi and others collected 65 kinds of classics, history and sub-classics, and based on the principle of "politics and art" and "governing the Tao", deleted the complex and simplified it, took its essence and condensed it into 50 volumes of rare books. Wei Zhi is a great statecraft, and his noble morality and excellent historical knowledge make Collection of Books a "book for the present", which is enough for reference; Passing on leaves can make Sun Mou a "classic".
However, this epic masterpiece has not been popularized because block printing has not yet been invented. In addition, the war in the late Tang Dynasty led to the loss of this book. Fortunately, Japan sent Tang envoys to copy it and brought it to Japan. After several generations of joint efforts, this book finally came out.