The whole sentence: summer months should not be completely thin, and it should not be extremely warm when it is cold. It is very comfortable to wear light clothes and lie down in bed, or cover your waist, abdomen, knees and shin.

Wear less in summer and not too warm in winter. It is good to wear light clothes in midsummer to cover the waist, abdomen, knees and legs.

Sleep in summer. Try not to turn on the air conditioner. It's too cold. Be sure to cover it with a towel. Gently cover your stomach, knees and calves. The lower body is more important than the upper body.