China is the city with the latest sunset. Why do men in this place wear hats all year round?

I have traveled to Xinjiang and came to Kashgar, the westernmost place in China. Due to geographical reasons, the time difference between here and Beijing is three hours. Under normal circumstances, the lights are turned off at 8 o'clock in the evening, and the sky is still clear. The most common thing is that men here wear hats all year round. Why? Xinjiang, the westernmost part of China, accounts for 1/6 of China's area. Because of its vast map and borders with eight countries, five ethnic autonomous regions have been created here because of its geographical particularity. Tibet was originally located to the west of China. After the development of the times, tourism began to rise here, and more and more people came to this place to travel. The hottest place here is Kashgar, which is the most prosperous city here. People come and go in the streets at night, and many performances with ethnic characteristics can be seen here. When you get here, the most difficult thing for you to adapt to is the time difference between day and night. Generally, 12 o'clock in Beijing is already late at night, and 12 o'clock here is just the beginning of the night life, especially in the food street here. Because of the long-term drought and abundant sunshine, the fruits here are particularly sweet, and the meat you eat is made by barbecue. It is simply memorable to taste the kebabs in Xinjiang. At this time in Beijing, the sky is just getting dark. Even at 12 o'clock in the middle of the night, the night market here has just begun to be lively for the locals. The most representative ethnic group here is the Uighurs, who pay great attention to national etiquette. Men should wear hats all year round, while women should wear headscarves all year round. This custom is a virtue for Uighurs to symbolize self-esteem and respect for others. This is why as soon as you enter this city, you will see men wearing hats and women wearing headscarves. The best way for Uighurs in Xinjiang is to sing and dance together. At night, they will build a fire ditch together, sit by the fire, sing and dance, and have a few kebabs. It is simply beautiful.