What is the oldest and most complete medical book written during the Spring and Autumn Period and the Warring States Period?

This topic should be "Difficult classics". Legend has it that this book was written by Qin Yueren during the Spring and Autumn Period and the Warring States Period. ~ ~ ~ However, this statement is not reliable. In fact, it was probably written in the Eastern Han Dynasty.

So,

From a recognized point of view, the oldest existing medical skill should actually be the Emperor's Internal Classic, which is basically confirmed to be written in the Western Han Dynasty.