The Emperor asked: "It is known that cold is best treated with heat, and heat is best treated with cold. The doctors have to follow this principle. However, there is a heat disease, and the heat remains after being cooled by herbs. Or there is a cold disease, and the cold remains after being warmed by herbs. The old cold or old heat is not gone yet, the new diseases arise. How can we treat them?"
Qi Bo answered: "As to all that remains hot after being cooled, nourishing yin should be selected. As to all that remains cold after being warmed, supporting yang should be selected. This is called seeking the attribute of yin-yang."
Key Word: great topic on supreme truth and importance, in the plain questions
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