Why do old people in Northeast China wear hats?

Old people in the northeast should wear hats to keep warm and protect. The hair of the elderly in Northeast China is sparse (easy to dissipate heat), and some blood vessels are not as smooth as those of young people, and even a little hardened. If you catch a cold, it will inevitably cause cerebrovascular contraction, which will lead to dizziness, headache and even accidents. You need a hat to keep warm. You are wearing a hat on your head. In case of a slight bump, the hat can "cushion" The elderly are relatively slow to respond, and their physical condition is more fragile than that of young people, so they can play an appropriate protective role. Therefore, the old people in Northeast China wear hats for warmth and protection.