Eight thousand scroll houses, Song Li House of Lu Xinyuan, Qin Tie Tong Jian House of Zhai Shaoji and Haiyuan Pavilion of Yang Yizeng are collectively called the four major libraries in the late Qing Dynasty.
In addition to about 40 kinds of Song edition and about 100 kinds of Yuan edition, there are many kinds of China ancient books, such as Ming edition, Sikuquanshu, celebrity manuscripts and school-based, Japanese and Korean engravings, which are the main features of its collection, and many of them have been collected by collectors in Ming and Qing Dynasties. In the thirty-fourth year of Guangxu (1908), the descendants of Shi Ding sold all the books to Jiangnan Library at a low price, and then hid them in Nanjing Library, which opened a special library for safekeeping and kept them well. The 8,000-volume architectural catalogue mainly includes Ding Bing's Collection of Rare Books and Ding Ren's 8,000-volume Architectural Bibliography.