The problem of connecting flight in San Francisco, USA

If you leave from China, you must arrive in San Francisco first, and then transfer to the next city. This is a mixed entry+transfer process.

The first place to arrive in the United States (or any country) is called the "entry" point. Yours is San Francisco. Go through immigration formalities. Get off the plane. 1. The only way is to go to the immigration office to check passports, visas and other documents. 2. Immediately after the immigration office, there is a conveyor belt for checked baggage. Look at the screen and see which conveyor belt your flight number is. Go and claim your luggage. Take the entry declaration form issued by the plane (now you can see how to fill it out) and all the luggage through the customs to check the substances. The customs takes random inspection (those who are randomly inspected may be arranged at the counter of the Ministry of Agriculture, and the luggage may pass through the X-ray machine first, and then it may be opened for inspection. These are contraband, such as unreported meat and fruit, cash worth more than $65,438+0,000, etc. Many people mistakenly think it is a security check. After passing through the customs, it is immediately the baggage transfer area for transit passengers, and the baggage of transit passengers gets off. If you are a joint flight ticket (usually), the destination label will be attached to your luggage in China. At that time, all you have to do is push it to the airline to get off the plane without any formalities. Go to the boarding gate by yourself If you are delayed due to normal procedures or your arrival flight, the next flight will be arranged free of charge.

When you leave the United States, if you want to transfer through San Francisco, you should hang your luggage directly to China at the original starting point. When you transfer in San Francisco, you don't take out your luggage. You have to change the terminal (leave the security check area), then go through the security check, go to the boarding gate, get on the plane, and go through the border check in China when you arrive in China, and take out your luggage and go through the customs to check the substances.