Traditional Chinese Medicine
considers man and nature as
an interrelated unity.

Under the impact of certain pathogenic
factors, physiological activities of
the zang-fu organs and meridians become abnormal.

Looking, Listening and Smelling, Asking, Pulse-Taking and Palpation and Other Diagnostic Methods.

In diagnosis signs and symptoms must be found out with the specific diagnostic methods (four examinations) to know the nature of a disease.

As early as in the Huang Di Nei Jing (Huangdi's Canon of Medicine), the concept of "preventive treatment of diseases" was advanced.