Are only China people wearing long pants?

No, people in other countries in the world wear long pants, but it is a characteristic of China people that young people wear long pants.

Other countries wearing long pants:

Korea: Only old people wear long pants. Anyone who has dealt with Koreans knows that the standard dress of Koreans in winter is baseball caps, cotton-padded clothes, shorts and slippers.

Canada: Now, I basically don't wear long pants. I usually wear a pair of thick trousers in winter. If I want to work outdoors in winter, I will put a pair of down pants over my pants so that I can easily take them off as soon as I enter the room.

America: In the early years, autumn trousers also had a considerable market in the cold regions of America. Now, in the United States, where one person owns a car on average, you don't have to wear long pants when you enter the house to keep warm and drive out in winter, and young people don't wear long pants at all.

Japan: Similarly, only the elderly will wear long pants. It goes without saying that girls wear short skirts and bare legs when they go to school in heavy snow, because only women over 50 need them. Young girls like this are common in the streets of Japan. Older girls wear stockings, and no one wears long pants.

Worldwide, the high popularization rate of young people's autumn trousers is almost like confinement, which is a characteristic of China.

In fact, autumn trousers are trousers worn under woolen trousers, cotton trousers or outer trousers to keep warm when the temperature is cold. Generally, the weather turns cold in autumn, so wearing a pair of trousers is not enough to keep warm, so adding a pair of close-fitting trousers to the trousers is called autumn trousers, which is a northern vocabulary. In the south of Huaihe River, it is called cotton trousers, and in some places it is also called underpants and thread trousers. Autumn trousers belong to underwear and can't be worn outside. Moreover, the degree of warmth is second only to that of warm pants, which can effectively prevent cold.