American green card and American citizenship

American green card refers to permanent residence in the United States and enjoys all the same rights as American citizens except voting rights and American passports. American citizenship means becoming an American and being loyal to the United States. Europe is now exploring the policy of introducing the "EU Blue Card". In order to introduce talents, it is expected to start on 20 10. But in fact, all EU countries have their own unique "permanent residence system", such as foreigners with special talents, work, marriage and so on. China also has a "green card system", but only for foreigners who have made special contributions to China. Hong Kong's talent plan is mainly a special policy to introduce foreign talents, giving senior talents a green light and allowing them to obtain Hong Kong citizenship quickly.