When collating ancient books, we should choose a book as the main book, and then collate this main book in various ways. This book is also called the base book for collating. When you punctuate ancient books, you should also choose a book to punctuate. This book can also be called the base of punctuation. When commenting, translating and indexing, you should also choose a notebook for annotation, translation and indexing respectively. This notebook can also be called the base of comments, translations or indexes. In addition to photocopying, the original books used in other sorting methods can also be called "exercise books".
If there are several different books in an ancient book, there will always be advantages and disadvantages. Of course, photocopying should use the best and discard the worst, but in proofreading, punctuation, annotation, modern translation and indexing, we should also avoid using the worst and try to choose the best as the background.
Documents issued by the Privy Council in Tang, Five Dynasties and Song Dynasties. In the official documents of the above generations, the Chinese book is called grass, the Privy Council is called bottom, and the third division is called inspection. Bottom is bottom.