What are the categories of American relatives immigrants?

American relatives immigrants always fall into two categories:

1. Relatives who are not restricted by the number of global immigrants, that is, immediate family members:

Including spouses of American citizens, minor children of American citizens (under 2 1 year old) and parents of American citizens, all of which are classified as the closest relatives and available at any time.

2. Relatives who are limited by the number of global immigrants are divided into four grades in order of priority:

First priority: adult children of American citizens (over 2 1 year old) and their children;

Second priority: spouses and minor children of permanent residents, adult unmarried children of permanent residents and their children;

Third priority: married children of American citizens (regardless of age) and their children;

Fourth priority: 2 1 or brothers and sisters of American citizens.