What's the difference between immigration and green card?

What's the difference between immigration and green card? The green card in the United States is the proof of permanent residents in the United States, and the green card is the permanent residency, that is, foreigners who can stay in the United States for a long time; Immigrating to the United States means becoming a permanent resident of the United States.

The concept of immigration:

People from one country apply to live and work in another country for a long time, get approval from that country, and then go abroad. This process is called immigration.

Immigration, or successful immigration, refers to having the legal right to live and work permanently in the country, that is, the so-called permanent residency, rather than having foreign nationality immediately. We usually refer to "overseas Chinese", that is, China people who live abroad but still have China nationality and hold China passports.

The concept of green card:

The term "green card" originated in the United States, because the earliest permanent residence permit in the United States was a green card. With the change of design, the version of 19 was updated. Now it is a white plastic card with a yellow-green pattern, but the name "green card" has been retained. Other countries follow the United States and call their permanent residence permits green cards.

A green card is a permanent residence permit for foreign citizens. Holding a green card means that the cardholder has the permanent residence in the issuing country, and at the same time, holding a green card can exempt entry visas for a certain period of time.