What is the entry I-20 or IAP-66 or I-94 at an American airport?

I-20 international student registration form is issued by the school and registered in the immigration system.

I-94 is an entry and exit form filled out on the plane, which is used by the US Immigration Service to track the entry and exit of foreigners.

I-94 is the entry and exit certificate, and everyone has to fill it out.

Entry and exit certificates need to submit the Application Form for China Citizens Going Abroad for Private Purposes, which is completely filled in and affixed with the applicant's recent bareheaded color photos.

Submit a copy of my household registration book (or original household registration certificate) and resident ID card (or temporary resident ID card), and submit the original.

Entry inspection procedure

(1) Passengers are guided to the entry inspection room and queued for inspection according to different entry visas. Non-immigrant visa holders should be non-residents, and immigrant visa holders or green cards should be citizens/residents.

(2) When it's your turn to be inspected, hand in your passport, I-20 or IAP-66, I-94 and customs declaration form to the immigration officer for inspection. You know, holding a passport and visa does not guarantee entry.