Yunnan is one of the provinces with a largest number of ancient books in China, having more than 1 million volumes of old books. Most of these books are kept in different local libraries, museums, and temples, while some of them are still collected by individuals. They have suffered severe erosion as time goes by, making the repair so urgent. Therefore, the Yunnan Provincial Center for Preservation and Conservation of Ancient Books has conducted a volunteer program of ancient-book restoration since 2012 to recruit more experts and talents in repairing old books from universities and libraries.
According to Ji Sicheng, the director of the Yunnan Provincial Center for Preservation and Conservation of Ancient Books, the experts and volunteers have repaired over 14,000 pages of ancient books in the Yi language, including Zhan Bing Shu, Wucha, Kaichangji Jing, Jia Nuer Jing, etc., as well as 2,000 pieces of ancient books in Tibetan, such as Da Bao Ji Jing, etc. In addition, their newly invented restoration techniques have gained recognition from the National Center for Preservation and Conservation of Ancient Books.