The identity of a "green card" is "permanent residency". The term "green card" originated in America, because the early permanent residence card in America was a small green card. Today, "green card" has been extended to the meaning of "permanent residency". We will habitually refer to the permanent residency of all countries as "green card", but it has different names in other countries, such as "Maple Leaf Card" in Canada. The biggest difference between a green card and a passport lies in political rights (right to vote and stand for election) and obligations. Holding a green card in one country means that cardholders can freely enter and leave the card-issuing country without a visa, have the right to live, work and study permanently in the card-issuing country, and enjoy social benefits such as public medical care and education. Holding a country's "passport" enjoys exactly the same welfare and political rights as a Sri Lankan native citizen. Of course, civil obligations such as tax payment and military service also need to be fulfilled accordingly. Article 5 of China's Nationality Law: "One or both parents are citizens of China, and I was born in a foreign country and have China nationality; However, if one or both parents are citizens of China and reside in a foreign country, and I have a foreign nationality at birth, I do not have China nationality. "
Legal basis: Article 5 of China's Nationality Law: "One or both parents are citizens of China, and I was born in a foreign country and have China nationality; However, if one or both parents are citizens of China and reside in a foreign country, and I have a foreign nationality at birth, I do not have China nationality. "