What preparation materials do you need for visiting relatives visa in the United States? What is necessary and what is supplementary? Do I have to give it all to the consulate when I interview?

2DS- 160 Form Confirmation Page

3 A photo.

Original receipt of visa application fee

Passports containing previous visas to the United States, including expired passports.

Household registration book, ID card, employment certificate, payroll that can objectively reflect your monthly income, passbook with regular access records, etc.

Invitation letter (information of the inviter, purpose of visiting the United States, pre-arranged itinerary)

Proof of funds: a payroll that objectively reflects your monthly income, a passbook with regular access records, etc.

If you visit relatives in the United States, you should provide materials to prove that you have a real and uninterrupted kinship with the inviter, and also consider providing their identity after entering or immigrating to the United States. The following documents may be helpful to your application: household registration book or other documents that can prove true kinship, photos taken with American relatives in recent years, copies of American passports or green cards of relatives, copies of passports of relatives who have stayed in the United States for a short time, and copies of American visas. If your last stay in the United States exceeds the date specified on the I-94 card at the time of entry, please show the original extension certificate approved by the US Department of Homeland Security during the interview.

All of the above need to be brought, because the visa officer's questions are random and I don't know what kind of information I will read. Maybe you can look at nothing. Only the first four items need to be handed in.