About the US F4 visa interview~~~~~~~~~~

I don’t know where you got this from. Now it’s just a change in the appointment procedure, and there are no changes in other interviews. Submit the documents on the first day and have an interview on the second day. It may be a student who submitted the visa. After the documents are submitted, the embassy requires an interview. Those who apply for a visa by extension are those students who are renewing their visa. In principle, they do not need an interview.