I am from the south and want to go to Lhasa. What should I pay attention to and prepare? thank you

I am a Tibetan in Lhasa, Tibet. First of all, I want to be surprised by the irresponsible answer in Tom, dick and Harry. The security in Tibet can be said to be very good. You'll know then, so I won't go into details. It's not necessary. Back to the problem itself. If you have a bad respiratory tract in Tibet, there is not much problem. It is best not to catch a cold. Then go to Tibet, no matter which month you plan to come, don't just bring short sleeves in summer, because of the big temperature difference, you should bring some long-sleeved clothes and pants. If you only bring two short sleeves for sightseeing, you can't wear them Then the most important thing is to buy a lipstick, because it's dry here, and your lips will crack badly, because the south is still wet after all, and you can't adapt at once. Umbrella sunscreen is also necessary, and it seems to be used all the time when going out. Then I think if you feel uncomfortable here, you can buy drugs or something, otherwise it will waste money, because many people don't respond at all. You can go to Sheng Jie drugstore or Lhasa drugstore to buy it. These are two pharmacies with relatively complete medicines in Lhasa, which are recommended by someone. If you have any difficulties in coming to Lhasa, you can trust me privately and I will help you. Also, it's best not to dress up as a tourist when you come to Lhasa, but wear a coat or something. Businessmen kill people like you ~ ~