What are the procedures for flying from Shanghai Pudong Airport to the United States for the first time?

Check your passport and American visa and boarding pass when you go through customs. Fill in the US Customs Declaration Form (in Chinese version) on the plane, show your passport and relevant documents at the customs when you get off the plane (the invitation letter is used for business and visiting relatives, the student certificate is used for studying abroad, or the return ticket for tourism planning is used for tourism), and hand in the customs declaration form. Immigration officials check and seal the entrance.