What does seventeen green cards mean?

It is a permanent residence permit for Korean men in China. SEVENTEEN is a men's team launched by South Korea's PledisEntertainment Company on May 26th, 20th15th. Seventeen green cards, permanent residence permits for foreigners, are permanent residence permits for foreign citizens. Holding a green card means that the cardholder has the permanent residence in the issuing country, and at the same time, holding a green card can exempt entry visas for a certain period of time.