Gao Huiyun checks an ancient book at a workshop in Shijiazhuang, capital of north China's Hebei Province, Aug. 2, 2018. Gao Huiyun is a teacher of cultural relics restoration and protection at Hebei Vocational Art College. Gao has restored over 1,000 ancient books in her 13-year career time. (Xinhua/Chen Qibao)