What bags do boys take when they travel?

Take a small messenger bag and keep your camera, valuables and other things with you (some are sold in sporting goods stores such as Li Ning) so that you won't lose them. Don't take that small bag without it, it's easy to forget. Take a backpack, change clothes and the like, a sports backpack that can hold a lot of things, and souvenirs bought can also be put in this big backpack. That's enough. Don't bring too many things.