Is the green card valid?

The green card has a validity period, and the validity period of the green card is 10 year. After the expiration of the validity period, you need to submit an application to the Immigration Bureau for replacement of a new card.

Under normal circumstances, permanent residents (green card holders) can re-enter the country with a green card as long as they have been abroad for less than one year. However, if they leave the country for more than one year, their green cards will not be enough to ensure their re-entry, and their green cards may be confiscated upon entry. Before leaving the country, green card holders should apply to the US Immigration Bureau for re-entry permit if the expected departure time is more than one year.