What are the bibliographic contents in the ancient private books in China?

Seven Liu Xiang, Liu Xin and his son wrote "Bielu", "Qilue" and other books, and later generations also have monographs. In the Southern Song Dynasty, Zheng Qiao wrote Tongzhi and An Introduction to Textual Research. By the Qing Dynasty, Zhang Xuecheng had written A General Theory of Textual Research, which summarized rich experience in bibliography. The largest and most comprehensive catalogue reflecting China's ancient works is the General Catalogue of Sikuquanshu and the Concise Catalogue of Sikuquanshu.