Does the subset of classics and history include all ancient books?

"Classics and History Subsets" are four categories of ancient books in China, but not all ancient books are included in the Classics and History Subsets. There are so many ancient books that it is impossible to collect them all. Sikuquanshu is the largest series in the history of China personally organized by Emperor Qianlong. It started at 1772 and was compiled after ten years. The series is divided into four parts: classics, history, books and collections, hence the name Sku. According to Wen Jin Ge Ji, the book contains 3503 kinds of ancient books, 79337 volumes, and more than 36000 volumes are bound, which preserves a wealth of literature. The name "Four Treasures of the Study" originated in the early Tang Dynasty. The official collection in the early Tang Dynasty was divided into four stacks of classics and history, which were called "Four Treasures of the Study" or "Four Treasures of the Study". The quartering of the subset of classics and history is the main method of ancient book classification, which basically covers all ancient books, so it is called "the whole book". Sikuquanshu does not include all the ancient books.