This book collects 12 kinds of folk prints of Song, Yuan, Ming and Qing Dynasties. Vulgar characters, which are commonly used in ordinary people's daily lives, have been promulgated, some of them have been designated as simplified characters/standardized characters, and a large number of them have been abolished at the same time, so the chances of vulgar characters appearing in formal occasions are getting less and less. There are 6,240 kinds, including 349 biographies of ancient women published in Song Dynasty and 349 poems of Tang Sanzang. There are 963 kinds of ancient and modern zaju published in Yuan Dynasty, 385 pieces of Quanxiang Three Kingdoms Pinghua and 628 pieces of Taiping Yuefu. There are 397 poems about Ji, 304 poems about Xue Baipao crossing the sea, and 374 poems about Yue Fei breaking the east window. In the Qing Dynasty, there were 852 pieces of tanci in Mulianji (Incomplete), 470 pieces of Shu Qi in Jin Ping Mei and 739 pieces of Yi Shi in Lingnan, among which "Bao", "Quan", "Li", "Sheng", "Shuang" and "He" were all found again in various books. These 6240 simplified characters and traditional characters are 1604 characters. On average, each traditional Chinese character has 3.9 different simplified Chinese characters. The same words as today's simplified character list are: things, treasures, rituals, sounds, meetings, cherishing, mixing, Luo, listening, Wan, Zhuang, dream, Yang, although, medicine, phoenix, righteousness, chaos, wrinkle, Taiwan, government, war, return, party, words and break.