Which countries can hold dual citizenship at the same time? China cannot hold the nationality of two countries at the same time? Korea?

It is understood that among more than 90 countries in the world, more than 70 countries now recognize or accept dual citizenship. China is not one of them. China's Nationality Law clearly stipulates that "People's Republic of China (PRC) does not recognize the dual nationality of China citizens" and that "China citizens who have settled abroad voluntarily acquire foreign nationality will automatically lose their China nationality".

Many countries will attach conditions to dual nationality according to their national conditions. For example, children of international marriage must choose a nationality when they grow up, and some countries will use international conventions or bilateral contracts to solve the problem of dual nationality.

Canada's current citizenship law recognizes dual citizenship, that is, Canadians who have acquired the citizenship of other countries can still retain their Canadian citizenship unless they apply for renouncing their Canadian citizenship and obtain the approval of a citizen judge. If you are an overseas-born immigrant, you are likely to have dual nationality. Even if a Canadian-born child grows up and lives in another country and obtains citizenship of another country, Canada recognizes his dual citizenship. However, since China Nationality Law does not recognize dual nationality, when you have Canadian nationality, China nationality will naturally be lost.

The policy of the United States is to acquiesce in the existence of dual nationality, and the law does not involve dual nationality or require a person to choose one or the other nationality. However, because of some problems that may arise from dual citizenship, the American government has adopted a discouraging attitude towards it, especially in its recent efforts to strengthen naturalization and emphasize loyalty to national interests, paying more attention to citizens' loyalty to the country.

Argentina recognizes dual nationality and has signed dual nationality agreements with Spain, the Philippines, Italy and other countries.