My husband and sister have emigrated. Can my husband and I emigrate?

There are many kinds of relatives immigrants, which are generally divided into the following categories.

The first category is the migration of husband and wife.

The second category is children sponsoring parents to emigrate.

The third category is immigrants sponsored by brothers and sisters.

The fourth kind of family reunion immigrants.

The first and second types of immigrants exist in every country, but the third and fourth types do not. Australia has 124 category, Canada used to have 4 categories, but now it has been cancelled, and the United States has 3 categories, and now it has been cancelled.