Necessary for outdoor travel: documents that can prove identity, such as ID card, student ID card, work permit, etc. Lip balm is essential. When traveling in dry areas (such as Jiayuguan, Dunhuang, Turpan and Tibet), you can avoid the pain of chapped lips and bleeding. Swiss army knives or small scissors and tool knives are essential tools. Fruit knife: Long-distance travel must always eat fruit and supplement vitamins (especially in desert and plateau areas), so fruit knife is indispensable and also a self-defense tool. Small flashlight: Small flashlight will play a powerful role when a long-distance bus stops to eat, relieve oneself or break down at night. At the same time, visiting night markets, hotels, unexpected power outages at night or going to places without electricity are also inseparable from small flashlights. Bring your own spoon: restaurants where buses stop and restaurants in backward places usually have no health protection, so spoons have their own uses. If you go to places rich in watermelons such as Xinjiang, spoons are even more indispensable. Military backpack belt. Cheap hotels rarely have clothes hooks for hanging clothes and towels, while small backpack can hang clothes and towels in the room, which is both sanitary and convenient. At the same time, climbing mountains and tying luggage can also be used frequently. There are also three to five spare plastic bags, which can be used to collect wild fruits and store food and newly bought items. If you travel to Tibet, cold medicine and anti-hypoxia medicine (such as rhodiola capsule) are the most commonly used drugs. Notebook, write down feelings, events or mailing addresses at any time. Tissue, commonly used. Camera and film. Maps, mineral water. Sunglasses, without them, it will be difficult to open your eyes when climbing snow-capped mountains in the sun. Ultraviolet rays in Tibet are very strong. Take first-aid medicine with you, which varies from person to person.