The earliest extant monograph on acupuncture in China is

Acupuncture classics.

Acupuncture and Moxibustion Classic A and B is the earliest extant acupuncture monograph in China. It is also the earliest book that we know that combines acupuncture theory with acupuncture theory. It has been 1700 years since today.

The Classic of Acupuncture and Moxibustion A and B systematically summarizes and sorts out the ancient acupuncture therapy, which has played an important role in promoting the development of acupuncture.