Comrade Gu has been devoted to the rescue and collection of genealogy, Zhu Juan, diaries, notes, personal files, ancient manuscripts, school-based manuscripts and revolutionary documents for a long time. For example, he collected nearly 100 kinds of early revolutionary books and periodicals, such as the Manifesto of the Producer Party translated by Chen Wangdao and the Series of Peasant Movement by Mao Zedong, from miscellaneous books discarded by others. In the mid-1950s, he rescued tens of thousands of genealogical documents from the waste paper piles in the paper mill. As early as the 1940s. He compiled one or two episodes of UPI library series. After taking charge of the Shanghai Library, he put forward the plan of not isolating printed books. In 1950s and 1960s, he presided over the compilation and publication of more than 30 kinds of precious arc-cutting books in Song Dynasty, such as Tang Jian and Yu Yun Yang Qiu, and made them public. His Bibliography of Zhang Si Dangzhai and the first edition of Catalogue of Ming Publications (co-edited with Pan) became famous in 1930s. China Comprehensive Records Series edited by him is rich in content, detailed in classification and convenient to retrieve. He also served as the editor-in-chief of the Bibliography of Rare Books of Chinese Ancient Books and the editor-in-chief of the Continuation of Sikuquanshu.
Mr. Wu Yuzhai's Chronicle, A Record of Ancient Wen Tao, and A Compilation of Shangshu Characters, which he collaborated with Gu Jiegang, all have high academic value and are well-known at home and abroad. He is also a professor at Fudan University and East China Normal University.