Is Changchun very cold in winter?

It's over 20 degrees below zero, and the room is usually warm. People wear thick wool pants, thermal underwear, cashmere pants and camel hair pants in cold weather. Upper down jacket, small shirt inside, sweater and so on. Will still be dressed in fashion. I feel that there are still a few days of cold in Changchun in winter, but just these days, the cold air is not so cold as soon as it leaves. Besides, there is heating in the building and the room is very warm. The greenhouse effect is getting more and more serious. The winter in Changchun is getting hotter every year. Last winter, the temperature never dropped below MINUS 25 degrees, and it was cooler than Shandong in summer. The hottest is only 32 degrees. The wind is moderate. There are four seasons, spring is short and winter is long.