According to years of research, Dunhuang hard pen has more than 20,000 pages, mostly paper and silk, including Chinese and more than ten kinds of ancient flags. The main content of this book involves literary works, letters and Buddhist scriptures.
1972, Chinese archaeologists discovered a bamboo pen container at Xixia site in Wuwei City, Gansu Province, which is very similar to Lu pen in shape and material, especially with a notch in the center of the pen tongue, which is in the shape of a double petal and a sharp tip, such as the current pen. In addition, a bamboo cone pen was found in a site in Dunhuang in 199 1 year. On this basis, some scholars assert that there should be a pre-Qin hard pen era in the history of calligraphy in China before the arrival of brush calligraphy in the Western Han Dynasty.