Extreme heat produces cold, and extreme cold produces heat. How to say this specifically?

The literal meaning is that when it is extremely hot, it becomes cold, and when it is extremely cold, it becomes hot.

The most popular term refers to the change of seasons, that is to say, the weather will slowly get cooler after reaching the hottest point in summer, and the weather will slowly start to get hotter again after the coldest point in winter.

In traditional Chinese Yin-Yang theory, it is believed that Yin and Yang can transform into each other under certain conditions, and this condition is "pole". For example, "Suwen·Yin and Yang Ying Xiang Da Lun" says: "A heavy yin must be yang, a heavy yang must be yin".

This is also the case pathologically. From the perspective of traditional Chinese medicine, if cold symptoms develop to the extreme, false heat will occur; conversely, if heat symptoms develop to the extreme, false cold will also occur. "Lingshu·Disease Diagnostic Ruler" says: " The changes of the four seasons, the victory of cold and heat, the heavy yin must be yang, and the heavy yang must be yin, so yin governs cold, and yang governs heat, so if it is cold, it will be hot, and if it is hot, it will be cold."