What information do I need to provide to enter the United States freely?

Free entry into the United States requires.

1, passport;

2. visa;

3.I-20 form (if it is an international student);

4. Fill in and sign the customs declaration form;

5. Other supporting materials (admission notice, transcripts, economic certificates, etc.). These documents are generally unnecessary, but just in case, I suggest that you put all these materials in your carry-on luggage and take them out at any time.

Other items that need to be carried:

1, passport and other basic documents are necessary, so you should take them with you to avoid losing them.

2, mainly international credit cards, which can be used for eating and shopping. Look at the itinerary in cash, don't bring too much.

3. Always keep cold medicine, motion sickness medicine, digestive medicine, antidiarrheal medicine, essential balm and other medicines. But pay attention to the right amount, otherwise it will be easily confiscated by the customs.

4, all kinds of snacks. Puffed food, melon seeds, hawthorn slices, candied fruit, shredded squid, dried bean curd, pickled mustard tuber, etc. In case you can't find a good supermarket in China in the United States, you can bring more in China. Be careful not to bring sausages and other meat products, the customs will check!

5. Open international roaming before the mobile phone goes abroad, handle related business, and avoid unnecessary expenses.

6. Change the plug. Although many hotel sockets and porcelain plugs can be used directly, just in case.

7. Windproof clothes and clothes that are easy to dry. It is cool in San Francisco in the morning and evening, and it may be cooler in some parts of the eastern United States, depending on the weather forecast.

8, sunglasses, sunscreen, hats and other sunscreen products. Las Vegas is very hot, the Grand Canyon and other places are hot and sunny, so pay attention to sun protection. Of course, umbrellas and disposable raincoats are also needed.

9. Skin care products, personal toiletries, slippers and towels. American hotels may not have disposable toiletries. Meixi is relatively dry, so we should also pay attention to moisturizing.