The function of the first paragraph of Man Jing's travels in the text

Yuan Hongdao was born in Jiangnan (Hubei Public Security Bureau). The cold in the northland somewhat hindered his interest. The first paragraph of the article wrote about the distress of wanting to swim. Early spring and February is not strange to northerners, but it is unbearable for a person who grew up in Jiangnan. The author rationally knows "Yan Dihan", but "After the Flower Festival, the residual cold is still thick" is his personal feeling and experience. The word "Yu" and the word "Jude" set each other off to describe the situation in which the cold current refused to stop. So, what is its specific performance? The author describes it in extremely concise language: "When it is frozen, it will fly sand and stones." Saying "cold wind" instead of "cold wind" is to illustrate the degree of cold, and also shows the author's sensitivity to "cold in the wild". In such bad weather, we had to "squeeze into a room and go out." From the perspective of "every time I take an adventure in the wind, I don't know how many times I have tried, but I have no choice but to return".