What plateau necessities should I prepare in advance to go to Lhasa by train?

When we go to Lhasa, we must take some medicines to prevent colds, inflammation and altitude sickness, and take rhodiola one day in advance to prevent our altitude sickness. We should also bring some sun protection clothes and cold protection clothes, such as some coats, sweaters, outdoor shoes, umbrellas, face towels, sunscreen and water cups. These are all things we need to bring. What's more, you can't bring puffed food, which will cause damage on the plateau. The ultraviolet rays in Lhasa are very strong. You should wear sunscreen whether it is cloudy or sunny, and keep warm, because it is very cold there. When we go to Lhasa, we should take sunglasses and a camera. In order to take pictures, most people go to places at an altitude of 3000 meters. There will be altitude sickness, which will cause headache, chest tightness, weakness of limbs and tinnitus. These symptoms are caused by lack of oxygen, so bring oxygen bottles. In Lhasa, there are many banks, which are also distributed in towns, so you don't need to bring too much cash to avoid losing it. Besides, we must prepare some food when we go to Lhasa. It is a long way to Lhasa by train. Everything on the train is expensive, not only expensive, but also bad in taste, so prepare food, such as some vegetables and fruits. Although fruit is sold in the midway station, it is not fresh, and Lhasa does not produce fruit. Fruits on the road can also replenish people's water and improve their adaptability to altitude sickness. You should take winter clothes to Lhasa. Although the weather is the same as that in summer, it will be very cold at night. Wear more clothes to prevent colds. It is very tiring and difficult to take the train. Bring some toiletries and slippers to make yourself more comfortable and keep in good condition. When you go to Lhasa by train, you must prepare a charging treasure to keep your mobile phone powered. The most important thing is to prepare water on the way, keep in good condition and have enough energy to travel.