Unless you have visited many times in the past three years (not all criteria are the same), you may get multiple entry permits for 1 year. Schengen visa: refers to the visa issued according to the Schengen agreement. The agreement was named after it was signed in Schengen, Luxembourg, and stipulated the single visa policy of member countries. According to this agreement, any visa issued by Schengen member countries is also considered valid in all other member countries, and no visa application is required. The country that implements this agreement is the so-called "Schengen country".