Traditional Chinese medicine

Treatise on Cold Damage Disorders and Miscellaneous Illnesses (Shang Han Lun)
Yin and yang symbol for balance. In traditional Chinese Medicine, good health is believed to be achieved by various balances, including a balance between yin and yang.

Qi is believed to be partially generated from food and drink, and partially from air (by breathing). Another considerable part of it is inherited from the parents and will be consumed in the course of life.

The traditional categorizations and classifications that can still be found today are:

A bronze acupuncture statue from the Ming Dynasty being displayed inside a museum
The Chinese traditional medicine at one of Chinese traditional medicine shop at Jagalan Road, Surabaya, Indonesia.