In my case, how long does it take to pass the American immigration application?

I think it's not just 12 years. First, green card holders can only apply for unmarried couples or children. I can't start applying for you until your sister has successfully obtained American citizenship in the exam five years later. Sibling applications belong to the slowest category. You have to wait 12 years, which adds up to about 17 years, but there are other ways to be discouraged. If your parents are in the United States, it may take them eight years to apply for you (you can also apply for a green card). There are several other ways. You can invest in immigrants, 500 thousand dollars, or you can apply for labor by skilled immigrants (the simplest is skilled immigrants of chefs), but it is difficult to apply for labor because of the poor economy, you can also apply for studying in the United States, go there first, finish your studies and then find other ways to stay in the United States.