Which country has the largest number of foreigners?

The United States, the United States is an immigrant country, and the whole United States was established and developed by' foreigners'.

However, the United States has successfully assimilated immigrants from all continents, countries and colors into its own country, and finally formed the American nation.

Among them, the most difficult to digest are Italians and China people.

Because the two countries have the deepest cultural heritage.

Roman civilization and China civilization.