|The exterior of the National Library of China (Source: http://www.nlc.gov.cn/newen/newVisitUs/nlcIntroduction/index_4.htm|
It is renowned for its collection of ancient and rare materials. The NLC houses 270,000 rare records and 1,640,000 ancient records. The most valuable collections are the inscriptions on animal bones and tortoise shells from the Shang Dynasty (Oracle Bones), Dunhuang Manuscripts, the Zhaocheng Tripitaka of the Jin Dynasty, the Yongle Encyclopedia, and the Complete Library of the Four Branches of Literature. Among its earliest editions in foreign languages are incunabula printed in Europe from 1473 to 1477.
The NLC also has special collections of manuscripts of notable authors, documents on revolutionary history and doctoral dissertations in China. It is also one of the depository libraries for publications of the UN and other international organizations as well as foreign governments.
With the development of various new types of information media, the NLC has also begun collecting more electronic publications.
The above information is from the Introduction section of the National Library of China's web site.