What should I pay attention to when I apply for a visa at the US Consulate in Guangzhou? I am now 15 years old and help with immigration visa.

I got an immigrant visa in 2009. First of all, don't be nervous. There will be an interpreter there. The question is simply to ask who you are in the United States, when you went to the United States, and how you got there (or what visa). If he asks this question, he'd better say that he doesn't know, otherwise your relatives in the United States will have trouble coming to the United States irregularly, but I was not asked this question, just heard it from others), your relatives' birthdays, where they live in the United States, and what they do (this is not often asked) ... Then you should bring something that can prove your relationship with your relatives in the United States, such as photos and letters. Then don't be nervous. If you are too nervous, the visa officer may think you are lying, which is why you are so nervous. Calm down, keep smiling, and don't say anything irrelevant when answering questions. Immigrant visas are not very troublesome, and most of them will be signed (if they are fake, it will be troublesome for your relatives in the United States to be exposed). However, I heard that Wenzhou people are not very good at signing, and I don't know why. (I'm just saying things, that's all.) Maybe that's it. Good luck.