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What is American investment immigration?

It's some investment projects approved by the US Immigration Bureau. If you invest $500,000 or 100, the United States will give you a conditional green card. If the project still exists after two years, it will be given a formal green card. After five years, the project continues to exist and the investment has a return. However, after all, the project is not done by ourselves, and no one can say whether it will be profitable or not.