As an immigrant country, why can the United States accept the whole world?

First of all, the United States can't accept the whole world, and it needs layers of screening to get an American hukou. In other words, you are either rich, talented, famous or connected. In short, we must have one of them.

Secondly, the first half of your question just answered the second half. Because it is an immigrant country, the main force of national construction is immigration. If we don't accept other immigrants, this country will only be a virgin forest.

Finally, now everyone, especially the upper class, wants to immigrate to the United States. It mainly values the natural environment, superior living conditions and free and democratic political conditions in the United States. In fact, these are mainly based on the fact that the US GDP ranks first in the world. With the development of China's economy, I believe the domestic environment will also improve. There is no need to immigrate to America in a hurry. However, it is necessary to travel occasionally.

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