My aunt is in America and has got a green card. Her son is also in America. What preparations should I make if I apply for a visitor visa? What is my aunt going to do?

Because:

1, you are unmarried and 30 years old. (tend to immigrate)

Your aunt is a green card, not a citizen. Although both can be applied, they are completely different in nature.

As for economic security, it is very simple.

Your aunt's company can issue a letter to prove her length of service, position and annual salary. If it is a well-known big company, there will be extra points. At the same time, you can also issue a bank deposit certificate. You can also add a personal letter and be willing to bear all the expenses of your coming to the United States.

However, the most important thing is to see if you are inclined to emigrate. Otherwise, everything will be in vain.