中医基础理论形成阶段的中医四大经典是:What is TCM Four Medical Classics during the formation stages of TCM basic theory.

A、《黄帝内经》Huang Di Nei Jing;

B、《难经》Nan Jing;

C、《伤寒杂病论》Shang Han Za Bing Lun;

D、《神农本草经》Shen Nong Ben Cao Jing