The forerunner of the National Library of China, the Imperial Library of Peking was founded on 9 September 1909 by the government of the Qing dynasty. It was first formally opened after the Xinhai Revolution, in 1912. In 1916, the library received depository status. In July 1928, its name was changed to National Peiping Library and was later changed to the National Library.
Its holdings of more than 37 million items also is one of the world’s largest libraries. It houses official publications of the United Nations and foreign governments and a collection of literature and materials in over 115 languages. It aslo holds the largest collections of Chinese literature and historical documents in the world.
The library contains a collection of over 270,000 ancient and rare Chinese books, and over 1,640,000 traditional thread-bound Chinese book; over 35,000 inscriptions on oracle bones and tortoise shells from the Shang dynasty (c. 16th–11th century BC); more than 16,000 volumes of precious historical Chinese documents and manuscripts from the Mogao Caves in Dunhuang; copies of Buddhist sutras dating to the 6th century; old maps, diagrams, and rubbings from ancient inscriptions on various materials.
Among the most prized collections of the National Library of China are rare and precious documents and records from past dynasties in Chinese history.
According to en.wikipedia