 The National Library of China, with a collection of over 26 million volumes, is the largest library in Asia, housing the largest collection of Chinese books in the world.In the library's collection are over 35,000 oracle bones and tortoise shells carved with ancient Chinese characters, 1.6 million volumes of traditional thread-bound books, over 16,000 volumes of documents from Dunhuang Grottoes, 12 million volumes of foreign-language books, and dozens of electronic databases.The library started to accept the submissions of official national publications in 1916, becoming the main national database; and began to accept submissions of domestic electronic publications in 1987.