Restorer demonstrate how to restore ancient book in National Library of China(1/3)

A restorer demonstrates the process of the restoration of an ancient book during an activity held by the National Library of China in Beijing, capital of China, Oct. 11, 2019. (Xinhua/Yin Gang)

Restorer Tian Tingting demonstrates the process of the restoration of an ancient book during an activity held by the National Library of China in Beijing, capital of China, Oct. 11, 2019. (Xinhua/Yin Gang)

Restorer Tian Tingting demonstrates the process of the restoration of an ancient book during an activity held by the National Library of China in Beijing, capital of China, Oct. 11, 2019. (Xinhua/Yin Gang)