What is the experience of traveling around the world alone?

Those who choose to travel alone are brave, not to mention those who travel around the world alone. These people are very self-reliant and trust their warriors very much, because when you travel alone, you always face various difficulties. For example, when you go out to play, your suitcase is relatively safe when you leave it in a hotel, and that is to say, you can't sleep when you take the train. If you sleep, your suitcase will be safe. You are the only one who can help yourself. Everyone around you is a stranger. It may be better to meet some kind people, but if you are unfamiliar with the surrounding environment and don't understand the language, it will also cause great trouble. Therefore, people who travel by themselves are very courageous people.