The fifth treasure of the study - paperweights. Ancient literati often put small bronzes and jades on their desks to play with and appreciate them. Because they all have a certain weight, so while admiring them, people will also The hands were used to press paper or books. Over time, it developed into a kind of stationery utensil - paperweight. Paperweights are also called "bookweights". The appendix "Yuan Rongzu" to "The Biography of Nanshi Yuanhu" says: "The emperor tried to put his nose under the writing case as a wooden shield, and used iron as a book to hold the meaning of the calligraphy. It was very strong, so as to prepare for any danger. He wanted to use it to replace the war. Calligraphers and painters must be prepared." Ancient paperweights mostly used three-dimensional shapes of animals such as rabbits, horses, sheep, deer, toads, etc. They were small in area and heavy in weight, and were mostly made of jade, ceramics, copper, crystal, etc. During the Ming and Qing dynasties, famous calligraphers and painters emerged in large numbers, which greatly promoted the production and use of study utensils. The materials and shapes of paperweights also underwent new changes. In addition to continuing to use copper and jade, stone and red sandalwood were also added. Wood, ebony, etc. are mostly rectangular in shape. For this reason, paperweights are often called rulers and pressure rulers. Paperweight is a stationery used by people to press down paper to make it flat and immovable when writing or painting. The book "Antique Guide" written by Zhao Ruzhen introduces: There are many types of paperweights. If there is jade, its shapes are jade rabbit, jade ox, jade horse, jade deer, jade sheep, jade toad, crouching tiger, jade mother and chi to ward off evil spirits, which are extremely ancient and elegant. Among the copper ones, there are plain green toads, crouching tigers, crouching chichis, sleeping dogs, gilded horses lying to ward off evil spirits, turtles and dragons, etc. There are also crystal and agate ones, and there are many kinds. As for porcelain, there are famous wares such as Guan Ge and Ding Kiln. Paperweights are valuable items in the study collection. Not only are the exquisite paperweights well made, they are also engraved with the following inscriptions: "There are roads in the mountains of books, and diligence is the path, and there is no limit to the sea of ??learning, and the boat is made by hard work." Come" and other mottos and famous sayings inspire people to work hard. When Pu Songling, the author of "Liaozhai" was young, he failed in many trials and became angry in the face of adversity. He made two copper paperweights and engraved a couplet on them to encourage his ambition: "Those who have a will, things will come true, and everything will be done." The Second Qin Pass belongs to Chu in the end; if you work hard and live up to the will of heaven, if you work hard and endure hardships, three thousand Vietnamese troops can conquer Wu. "If you can collect a bookstore used by a celebrity, the collection value and economic value will be very high.