The Nine Chapters on the Mathematical Art, Vols. 1-3

There is nothing more ancient in mathematical techniques than the "Nine Numbers." There is nothing more ancient among the "Nine Numbers" than this book. Although new methods have been repeatedly updated and calculations have become increasingly precise, when one exhausts the source and explores the roots, the hundred variations never depart from their origin. Recording and transmitting this is truly the crown of mathematical learning from ancient times to the present. Respectfully submitted for collation in the tenth month of the forty-ninth year of the Qianlong reign 1784 AD.

Chief Compiler: Subject Ji Yun; Subject Lu Xixiong; Subject Sun Shiyi
Chief Collator: Subject Lu Feichi