What can't I take with me in the US immigration inspection? (inside) and details of Detroit transit and immigration inspection.

according to the immigration laws of the United States, all people who enter the country from American land ports, airport ports or seaports are subject to inspection. If you fly to the United States, the service personnel on the plane will issue you with the I-94 form, that is, the Arrival/Departure Record, which records the personal information of the immigrants and their addresses in the United States.

There are four main inspection items at the entry port in the United States: 1. Public hygiene; 2. Immigration status; 3. Customs inspection; 4. Agricultural inspection. These four inspections may be conducted by one official or by several officials.

on the way to the United States, the flight attendant will distribute the I-94 form to the passengers for everyone to fill in. Passengers fill in the basic personal information and address in the United States on this form. At the port of entry, the immigration officer will check the documents and valid visas held by the immigrants and examine the reasons for going to the United States, and decide whether to allow the inspected people to enter the country and how long they can stay in the United States. If allowed to enter the country, immigration officials will stamp the I-94 form of the entrant and indicate the entry date, visa status and duration of stay in the United States. It should be noted that holding a valid American visa does not guarantee entry, and the immigration officials at American ports finally decide whether to allow you to enter the country. The I-94 form examined and approved by the port immigration officer is the proof of legal entry into the United States, which needs to be properly kept. If it is lost or damaged, it should be reported to the nearby immigrants in time and applied for a replacement. The I-94 form should be returned to the port immigration officer when leaving the United States.

Passports must be valid for more than six months beyond the scheduled stay in the United States. American customs inspection is very strict, and it is forbidden to bring fruits, meat, animals and plants and contraband.