The biological basis of TCM syndrome is the key and focus in TCM research.It has achieved a series of initial results but still no substantive breakthrough.The same syndrome in different diseases has a common material basis.The elucidation of its biological mechanism is an important way to reveal the modern scientific connotation of TCM syndrome.The same syndrome in different diseases is connected to the common pathogenesis in modern medicine and so it can be a ‘crosspoint’of both traditional Chinese and modern medicines.The biological basis of TCM syndrome was explored starting from different diseases with same syndrome in this article

and depression and chronic stress hypertension（ different diseases） and liver qi stagnation syndrome（ same syndrome） was taken as an example.