In the north, how to keep out the cold in winter?

In the north of winter, there are many good ways to keep out the cold. Put on more clothes properly, or just keep warm with a heater. When indoors, you can wear warm clothes, down vest and cotton vest, or you can wear down cotton vest or small down jacket. You can add down jacket or coat, hat, scarf and mask when you go out. When you sleep at night, you can use an electric blanket to keep warm, or use an electric heater to keep warm, or turn on the air conditioner to keep warm. Some people have strong cold resistance, so it's okay to use nothing.