What is the role of the time to see the snow in the lake pavilion and the background weather?

Background: In December of the fifth year of Chongzhen, I lived in the West Lake.

Time: It's a better day.

Weather: It snowed heavily for three days, and all the people and birds in the lake died.

Function: the language is simple and plain, but it has far-reaching significance. He not only pointed out the time and place, but also skillfully used the calendar of the Ming Dynasty to show that he did not forget his hometown. He teased the snow below and saw the snow on the lake without trace. In the second sentence, the author wrote snow from the perspective of hearing, while the word "absolute" wrote snow. Although the author did not describe the snow scene in detail, the word "Jue" made people see the spectacular scene of "blowing open the petals of ten thousand pear trees" and conveyed the gloomy chill of ice and snow. This high degree of freehand brushwork skillfully draws the majesty of heavy snow from people's hearing and psychological feelings, reflecting the people below watching snow in the cold. " "Watching the Snow in the Huting" describes the author's own experience of watching the snow in the Huting with refined pen and ink, describes the quiet and distant snow scene he saw, and expresses his leisure and elegance.