Repository of over 23 million volumes, the National Library of China is one of the largest libraries in the world. Notable items in this formidable collection include 35,000 oracle bones, copies of Buddhist sutras from the 6th century, and 16,000 historical manuscripts from the Mogao Caves in Dunhaung. It also has WIFI, 1,000's of electrical outlets, and air conditioning that is absolutely frigid. And it may be the quietest place in Beijing. Great place to study.