The craftsmanship of calligraphy and painting felt in Dingxing County originated from the Shanggu County era. It has gradually evolved from felt, civilian felt, and craft felt, and was born with the art of calligraphy and painting. Calligraphy and painting felt has the function of ink attachment and dehydration, which allows people to create to the fullest and complete more perfect works, so it is also known as the "fifth treasure of the study". The raw materials for traditional calligraphy and painting felt are more than 60 kinds of wool, and the entire production process is purely handmade. The basic procedures include picking wool, fluffing wool, forming, rolling, washing, rubbing edges, and trimming corners; the tools for rolling felt are basically slingshots, bamboo curtains, willow branches, etc. When making it, first weigh the approximate weight of the wool used, comb it by hand and lay it flat on the bamboo raft, then roll up the bamboo raft and tie it tightly, and repeatedly pour boiling water from top to bottom for more than ten minutes to increase the softening degree of the wool; then roll the felt for about half an hour, and then repeatedly step on it manually, and roll it up and arrange it many times until the density of wool interlacing increases, and then dry it naturally, so that the most primitive calligraphy and painting felt is made. He Laoyu, He Desheng and He Shen, on the basis of excavating and inheriting the traditional techniques of making calligraphy and painting felts, devoted themselves to research and boldly innovated, evolving the pure handmade traditional clear water felts into modern calligraphy and painting felts of various materials, specifications (including as small as 0.2 square meters and as large as hundreds of square meters), formats (including rice grid painting felts, vertical stripe grid painting felts, Ou Yan Liu Zhao font tracing felts, Lanting Xu tracing painting felts, etc.), and thicknesses. In 1986, He Shen established the Zhongtang Painting Felt Factory in Zhangjiazhuang Village, Zhangjiazhuang Township, Dingxing County, producing different varieties of calligraphy and painting felts according to the tastes of different consumers. The products include dozens of varieties such as blended (wool + chemical fiber), first-grade calligraphy and painting felts, special-grade calligraphy and painting felts, YT type, tracing (printing and strokes) printing grid painting felts, etc., with white, black and gray as the main colors. The calligraphy and painting felt produced by Zhongtang Painting Felt Factory has a flat surface, is soft and elastic, has a complete range of grades, is economical, convenient and durable, and has the characteristics of extensiveness, popularity and mass appeal. The products are sold not only in major and medium-sized cities across the country such as Beijing (Rongbaozhai), Shanghai (Duoyunxuan), Tianjin (Yangliuqing Painting Society), Guangzhou, Xi'an, Chengdu, Nanjing, Hangzhou, etc., but also exported to Hong Kong, Macao, Taiwan, as well as Japan, North Korea, South Korea, Singapore, Canada and other countries and regions. In 1998, Zhongtang brand calligraphy and painting felt was awarded the "Gold Award" by the Chinese Calligraphy and Painting Association. Modern Chinese famous calligraphers and painters Fan Zeng, Liu Zhenduo, Ouyang Zhongshi, Sun Qifeng, Wang Chengxi and others all use He Zhongtang calligraphy and painting felt. Calligraphy and painting art is the quintessence of China. Calligraphy and painting felt is inseparable from Chinese calligraphy and painting art, and inherits the excellent traditional culture of the Chinese nation. However, since the production of calligraphy and painting felt is an irregular and indeterminate product, the production process depends entirely on experience, its process is complex and labor-intensive, causing it to face an endangered state, so it is in urgent need of protection.