What does it mean that Xia Man is still out of the temple after seeking medical treatment, and the world is flexible and snowy?

These two sentences come from different poems and need to be explained separately.

The first sentence is full of summer, the weather is hot, you should go out to see a doctor. The second sentence is the sudden change of weather, which becomes extremely cold and snows all over the sky.

Xia Man returned to the temple after seeking medical treatment from Zhou He, a poet in the Tang Dynasty, and expressed his admiration for medical workers.

Heaven and earth turn into flying snow comes from the ancient poem "Seven words and nine turns to sand" written by Lv Yan, a poet in the Tang Dynasty. This sentence describes the extremely cold weather.