Traditional Chinese Medicine（TCM）has a long history in curing illnesses and caring for people's health.
The earliest known written record of TCM is Huangdi Neijing from the third century BC.This classic writing provides the main belief of TCM that remains the basis of its practice today.The belief of TCM is about the balance between yin and yang of the body.The two sides repeat many times in the same order according to season and age to influence people's health.It is a wonder that TCM doctors could cure patients without machines but only with a physical examination，which has four basic methods of diagnosis（诊断）—— observing，asking，and pulse﹣taking （脉诊）（症状）or signs and the medical history that they use.And pulse﹣taking is noting the pulse conditions of patients to know the changes inside or reactions of the illness.
In the development of TCM，doctors of different dynasties worked in practice and conclusion.Shennong Bencao Jing，Shanghan Zabin Lun and Bencao Gangmu are all important works for traditional medicine learners.
Nowadays，TCM has become popular all over the world.
