Do I need to cancel my account in China if I get a green card after emigration?

Absolutely not. We must first understand a concept. Generally speaking, immigrants can only obtain permanent residency in the country of immigration, or a green card. Just an identity, so that you can live in this country. If you want to become a citizen of this country, you will be naturalized. It often takes several years. Before you joined the nationality of another country, your nationality was China, so you don't need to cancel your China account.

In addition, China does not recognize dual citizenship. Theoretically, when you immigrate to another country and take up its nationality, you have to cancel your China nationality, but it also depends on the situation. Some countries will inform the China government of your naturalization, but others will not. Therefore, even if you are naturalized in a third country, there is the possibility of hiding your foreign identity, that is, invisible dual nationality. As long as the household registration department does not take the initiative to cancel, you are dual nationality.