Built in the 40th year of Jiajing in Ming Dynasty (156 1), it is the oldest existing library in China, which is Tianyi Pavilion in Ningbo, Zhejiang Province, with six rooms wide.

Two-story building, with cabinets for classics, history, books and collections on the upper floor, and books and stone carvings on the lower floor. The building opens windows in the north and south, and the air circulates. There are doors on both sides of the bookcase, which can not only take books back and forth, but also ventilate and prevent mold.

Wenyuan Pavilion in the Forbidden City in Beijing in Qing Dynasty

It is a library specially built for the collection of Siku Quanshu, and its housing system and bookshelf style are similar to those of Tianyi Pavilion.

Wugui building

Founded in the 12th year of Jiaqing in Qing Dynasty (1807), it is a private library built by Yuyao Renhuang. Surrounded by 72 peaks of Siming Mountain, it is also called "72 peak thatched cottage". There are more than 60,000 books in the building, among which "Wen Ming Leiti" preserves more than 400 selected books of the Ming Dynasty during the literary inquisition in the Qing Dynasty, which is the most valued by historians.

Yuhai club

This building was built by Sun, and his son, Sun Yirang, devoted his life to literature research and collection, which made the scale expand continuously. The books in the building are all catalogued according to the style and historical subset of Sikuquanshu. At present, most books are collected by Zhejiang University Library.

Zikawei Library

The building originated from the spread of Catholicism in China. During 1847, French missionaries bought land in the south to build buildings, and searched around for books based on the books they brought to China. This is the prototype of Xujiahui Library. This building was merged into Shanghai Library on 1956.

The seven pavilions of Sikuquanshu are Wen Yuan Pavilion in the Forbidden City in Beijing, Wen Yuan Pavilion in Yuanmingyuan in the suburbs of Beijing, Wenshui Pavilion in Fengtian Forbidden City (now Shenyang) and Jinwen Pavilion in chengde mountain resort, as well as Wenzong Pavilion in Zhenjiang, Wen Hui Pavilion in Yangzhou and Wen Lan Pavilion in Hangzhou.

Sikuquanshu is voluminous, but it has never been published in Fu Zi. Only seven volumes are hand-copied, which are stored in Wen Yuan Pavilion in the Forbidden City in Beijing, Wen Yuan Pavilion in Yuanmingyuan in the suburbs of Beijing, Wenshui Pavilion in Fengtian Forbidden City (now Shenyang) and Jinwen Pavilion in chengde mountain resort. The Wenzong Pavilion in Zhenjiang, Wenhui Pavilion in Yangzhou and Wen Lan Pavilion in Hangzhou have experienced vicissitudes, and pavilions and books have been devastated by frequent wars in modern China history. Wenzong Pavilion, Wenhui Pavilion and Wenyuan Pavilion were successively burned by soldiers. Only Yuan Wen, Jinwen, Wensu and Wen Lan still stand in the world.