First of all, clarify the nature of Yin and Yang:

Yang belongs to heat, which is located in the above table; Yin belongs to cold, and its position is below. Yin and Yang are the root of each other, interdependent and relatively horizontal. Yang roots in Yin, and Yin roots in Yang. In other words, there is no yin without yang, and there is no stomach yang without yin. Yin and mutual transformation, that is, Neijing said: "Cold extremes are hot, and hot extremes are cold; Heavy yin is hot, and Chongyang is cold. " "Extreme heat produces cold, and extreme cold produces heat."

The properties of Yin and Yang:

Above, outside, hot, bright and active all belong to Yang.

Below, inside, cold, dark, or cloudy.

Chinese medicine has "four qi, five flavors and five colors".

Four qi: refers to the properties of drugs, that is, cold, hot, warm and cool, also known as four properties. Heat and temperature are yang; Cold is yin.

Five flavors: sour, sweet, bitter, spicy and salty. Pungent and sweet are heat and yang; Sour, bitter and salty are all cold yin.

Five colors: red, yellow, white, blue and black. Red, red and yellow are heat and yang; White, blue and black are cold yin.

The trend of TCM acting on human body: ascending, descending, floating and sinking. Rise and float as yang; Shen, down to Yin.

The essence of TCM:

Light, heavy, cold, hot, warm, cool, clear, tonic, diarrhea, slippery, astringent, ascending, descending, floating and sinking. It's easy to judge,