Why is it more comfortable to spend the winter in the north than in the south?

Winter in the north is not cold. At Tianya Forum, I saw someone discussing where it is colder in the north and south. Judging by common sense, it is of course colder in winter in the north, and the weather forecast after the news broadcast every night is the best evidence. Harbin is often more than 2 degrees below zero. How do you live that day? Southerners sit in front of the stove and worry about northerners. The lowest temperature in winter in the south is usually around degrees, and northerners don't understand why southerners complain that winter is too cold. I was born and raised in the south and lived in the northern city for more than 1 years, so I should have some say in this debate. I want to say to those southern friends who are wrapped in coats, wearing gloves and surfing the internet by the stove in the cold night: you have worked hard! Although the lowest temperature in Beijing tonight is 8 degrees below zero and the cold wind is howling outside the window, I just need to wear a thin sweater indoors. Winter in the north is not cold, because there are two worlds inside and outside. Northern cities have heating systems to ensure that the room temperature is not lower than 16 degrees. Sometimes the heating is too hot, and the room temperature exceeds 2 degrees, so it is necessary to open the window to cool down. In the countryside in the north, there is a fire kang, or a coal stove for heating, which is not much colder. There is no heating system in southern cities, and the indoor and outdoor temperatures are very close. It is strange that it is not cold in winter. When I lived in the south, getting up in the winter morning was a very painful event, and I really didn't want to leave the warm bed. When you sleep at night, you need to wrap your head in a sweater, cover it with a thick quilt, and don't forget to put off your clothes on the quilt, but it is still possible to wake up in the middle of the night. Every winter, my hands are covered with chilblains, and the back of my hand is cracked with red holes, which makes me feel uncomfortable. However, my frostbite is not serious. I remember a math teacher in high school. His hands were frozen and he could see the bones. And happy northerners, many people have never even heard of frostbite. Some southern friends who finally understand the truth or have experience in living in the north are beginning to feel aggrieved: Why is there no heating in the south? Specifically stipulate which city is heated and which city is not. Our country divides the south and the north by the Qinling Mountains and Huaihe River, but this is probably the product of the planned economy era, and it may be unfair. The coldest places in winter are the provinces and cities along the Yangtze River, such as Shanghai, Jiangsu, Zhejiang, Anhui, Hubei, Hunan and Sichuan. Like Guangdong, Yunnan, Hainan and other provinces, which belong to the south of the south, there will be no cold feeling in winter. A netizen of Tianya Forum came to his own conclusion about why there is no heating in the south. He said: If northerners don't have heating in winter, people will freeze to death, and no matter how cold the south is, it will make you feel uncomfortable at most. This is a joke, of course. I think that the main reason for not heating in southern cities is the cost. The structural characteristics of houses in the south are that the walls are relatively thin, and there are only single-story windows, so heating is not conducive to keeping warm. Moreover, the winter in the south is relatively short. It is not only a huge investment to build a huge heating system covering the city, but also a problem whether there is enough energy supply. However, with the development of national economy, some cities along the Yangtze River began to build independent heating facilities when building new houses, and many residents used air conditioners and electric heaters to keep warm. Whether winter is cold or not, the temperature can't explain everything, and it is also related to air humidity. It is humid in the south and dry in the north. In a humid environment, it is very difficult for the temperature to be -1 degrees. On the contrary, in a dry environment, MINUS 1- degrees won't be much cold. Northerners who spend the winter in the south are not used to the cold there. Southerners who spend the winter in the north are like a duck to water. I once discussed the climate difference between the north and the south with a friend who is also from the south. He said that he finally understood why the ancient emperors of China liked the north as their capital, or the north was comfortable. Although this friend's historical knowledge is somewhat lacking, he tells the fact that the north is still comfortable.