China's four major libraries?

1. Wenyuan Pavilion is located behind the Cultural Hall in Donghuamen, the Forbidden City, and is the former site of the Temple of the Holy Trace in the Ming Dynasty. Built in the thirty-ninth and forty-first years of Qing Qianlong (A.D. 1774- 1776), it is the royal library for the collection of Sikuquanshu. The largest series of books in the world, Si Ku Quan Shu, was once hidden here, packed in a very elegant nanmu bookcase and placed on the bookshelf.

2. Wensui Pavilion is located in the west of the Forbidden City in Shenyang, Liaoning Province. It was built in the forty-seventh year of Qianlong (A.D. 1782) to store the Siku Quanshu in Wensui Pavilion, and the pavilion also houses the integration of ancient and modern books.

3. Wenjinge is located in the western plain of chengde mountain resort, Hebei Province, north of thousands of feet Snow Scenic Area. Built in the thirty-ninth year of Qianlong (AD 1774), it is the first of the four pavilions in the Forbidden City. In Wenjinge, 10,000 volumes of Ancient and Modern Books Integration and four sets of Imperial Poems were originally collected, and 1785 also collected Sikuquanshu here. After the Revolution of 1911, Siku Quanshu was transported to Beijing Library, and the ancient and modern books collected were sold by warlords in the early years. 4. The Wen Lan Pavilion is located at the southern foot of Gushan Mountain in West Lake, Hangzhou, in the Zhejiang Provincial Museum. It was founded in the 47th year of Qing Qianlong (AD 1782). It is one of the seven collections built for the collection of Sikuquanshu in Qing Dynasty, and it is also the only surviving one among the three museums in the south of the Yangtze River.