Experience of YAN Zheng-hua in treating stomachache.

Professor YAN Zheng-hua is a state-level renowned old doctor, intangible cultural heritage heir and educator of TCM. He has made an outstanding contribution to the development of TCM and Pharmacy. At present, Professor YAN Zheng-hua adheres to practicing in the clinic although he is over 90 years old. He emphasizes "deficiency and excess" as the key link and qi, blood, cold, hot, deficiency and excess as the global principle to treat stomach ache. In clinical practice, Professor YAN Zheng-hua is an expert in using famous TCM prescriptions such as Xiangsu San, Zuojin Wan, Yiguan Jian, etc. flexibly under the consideration of symptoms and syndrome.