What do you usually take when travelling abroad? For business men, usually a backpack plus a suitcase is enough. All sorts of daily things including entry and exit data are put in the bag, while the suitcase is loaded with clothes and utensils for washing and gargle.
There is one small experience: Passport, money, visa, card, air ticket and id card are important items. Please do not put them in the wallet. It is convenient, but once you lose it, you will lose it all which is sad to ruin the whole trip. It is recommended that you keep your money, card and id card in your wallet, and your visa, entry and exit documents and passport in your bag. Passport is easily worn and broken because it is often used abroad (airplane, hotel, shopping). Please keep it carefully, and you can buy a passport holder to store your passport.
If you have used it before, you should know that there is a simple version passport holder (only for passport), the one with the right size and thickness (standard size of Chinese passport: 12.5 × 9.0cm), which can generally store your passport and boarding pass. There are also multi-functional and practical models, such as card space, passport space, air ticket space, cash space, etc., and some will be added with coin wallet. As to buy what kind of passport holder, it depends on one's demand.