comprehensive catalog of the Imperial Library of the Four Treasuries, providing summaries and critiques of all books included in the collection as well as those simply noted by title

The annotated catalog of the Complete Library in the Four Branches of Literature, compiled in 200 volumes by [[纪昀|紀昀|ji4 yun2]] and others during the Qing dynasty; it provides summaries and critical evaluations of nearly 10,000 works.