Invitaton letter for Chinese Entry Visa In most of the case (please check with Chinese embassy or visa center in your country), the validity of Chinese entry visa is 3 months from the date of issue. Shaolin Secular Disciples’ Union / Shaolin Temple Secular Disciples’ Martial Arts School starts to send invitation letters to summer camp for visa application. If you come join us in summer camp 2018, please send pre-application form on this website so that we can send you invitat