How long is the green card valid?

Legal analysis: the validity period of green card is 10 year. After the expiration of the validity period, you need to apply for a new card from the Immigration Bureau. The United States and European countries have different management agencies for foreigners' residence. The issuance of visas and the issuance of residency in the United States are different departments. American embassies abroad only issue visas, and the above-mentioned period of validity refers to the period of validity of entering the United States rather than the period of residence. The length of residence is determined by the local American immigration officials. For example, the visa on your passport is valid for one month, but the immigration officer at the US airport customs can give you the right of residence for half a year or just seven days.

Legal basis: Measures for foreigners to enjoy relevant treatment for permanent residence in China. Foreigners holding permanent residence permits in China enjoy the same rights and obligations as China citizens in principle, except for certain rights and obligations that cannot be enjoyed by political rights and laws and regulations.