The "unill" in traditional Chinese medicine is equivalent to the "sub-health" state often referred to in modern science. Sub-health refers to a state between health and disease, also known as "gray state". Because the symptoms are not obvious, it is easy to be ignored by everyone. At present, more than 70% of the people in China are in a sub-health state, and most of the sub-health state is caused by daily bad habits, such as excessive drinking, often drink strong tea, yellow and other behaviors will give health hidden dangers.