Block printing before the Republic of China was called ancient books, excluding Shi Yinben and movable type printing.
In ancient books, 60 years of Qianlong is the boundary, and the previous books are counted as rare books. Manuscripts, collations and famous manuscripts after 60 years of Qianlong are also considered rare books.
The engravings from 60 years of Qianlong to the Republic of China are all ordinary ancient books.
See the General Catalogue of Rare Books of Ancient Books in China for details.