What is the pronunciation of "Huan" when it is warm and cold?

Idiom: it's cold when it's warm at first.

Pinyin: zhànu?

Explanation: Describe the climate as late winter and early spring or late summer and early autumn, alternating between cold and hot.

The ancient sound of "huán" is Hu á n.

In fact, even in modern times, a little earlier-for example,1960s, there is only one pronunciation, and there is no pronunciation of "hái" in Mandarin. That is to say, when it is used for "return", it is read as "huán", and when it is used for "or" and ",it is still read as" huán ". In fact, there is no usage of "or" and "in ancient poetry. The pronunciation of "hi" first appeared in Ming and Qing novels. For example, the fiftieth time in A Dream of Red Mansions: "He actually spent more time than building this garden".