Overseas Chinese work and live abroad, but they have not joined other countries' nationality. How did they survive for a long time? (such as the United States or Britain, France and Germany)

Take the United States as an example. After getting a green card in the United States, you can live in the United States for a long time.

Popularize the concept of American green card: American green card is an American permanent resident card, which is an identity document used to prove that foreigners have "permanent residency in the United States." They are only permanent residents of the United States, not American citizens. If they don't live in America for many years, they will lose this green card. According to American citizenship and immigration law, green card holders are foreigners who have neither American citizenship nor American citizenship. However, in the United States, they basically enjoy the same treatment as their nationals, but they have no right to vote and stand for election.

Understand the concept of green card, I believe it is easy to understand. I hope overseas Chinese can help you.