Bookmarks originated in the Spring and Autumn Period and the Warring States Period. At that time, bookmarks were generally called "toothpicks" and were made of bamboo pieces. Whenever the reader sees a very important place on the scroll, he inserts a "toothpick" at one end for later reference. Later, after the scroll book was folded, the "toothpick" was more widely used. At this time, the bookmark is made of fine ox bones and thick cardboard, and it is more elegant to stick a layer of patterned silk on the cardboard. Those scholars call the books they seldom read "untouched toothpicks". After the Song Dynasty, scholars paid more and more attention to bookmarks, and they liked to write some sentences such as aphorisms on bookmarks. Nowadays, some bookmarks are printed with decorative paintings, some are printed with poetry aphorisms, and some are printed with celebrity aphorisms, which is because of this.