What is the "first priority" in American immigrant visas?

The "first priority" in American immigrant visa means to arrange the visa category of immigrants first, so that the first priority will complete the visa faster. The types and priorities of immigrants are as follows:

Relatives migration

Immediate family members of American citizens

Spouses of American citizens

2/kloc-American citizens with unmarried children under 0/year old.

Parents of American citizens * are not subject to quota restrictions.

Priority immigration of relatives

Priority 1: Adult unmarried children of American citizens.

The second priority category: spouses and unmarried children of permanent residents

The third priority category: married children of American citizens

Fourth priority category: brothers and sisters of American citizens

* There is a quota limit for immigration applications, with 226,000 places per year.

Professional immigrants

The first priority category: excellent talents, executives of multinational companies, excellent researchers and professors (40,000/year).

The second priority category: master degree or above or special talents (40,000/year).

The third priority category: skilled workers, professionals with bachelor degree and unskilled workers (40,000/year).

The fourth priority category: special people, such as religious people, former government workers and retired employees of international organizations.

Wait a minute. (10000/ year)

Fifth priority category: investors or job creators (10000/ year)