What you must bring: print out the ticket and remember to confirm the flight; Passport (never expired) and other documents required for registration; Address book containing airport pick-up contacts, school contacts, relatives and friends; Courses and travel schedules; U disk containing the electronic version of the above documents; Wallet, cash (there are restrictions in different countries, find out how much you can bring) and bank cards/credit cards that can be used abroad; Change clothes, clean skin care products and/or travel cosmetics suitable for local seasons (some countries have capacity restrictions, so be sure to check clearly); Mobile phones, notebooks and corresponding special lines; Switch socket or switch wiring board (check the plug specifications of the country to be visited in advance); Nail clippers, hair dryer, and two hair bands if necessary (don't ask me how). Can be downloaded by mobile phone (such as cookbooks and dictionaries), too heavy (such as digital cameras such as SLR, except for photographers), and low local prices (such as can openers and various stationery).