... from the authorized government organization be provided at the time of application in Chinese embassies /consulates in your country ... Contents:Business InvitationDocument requirement: passport copy, visa record copy,processing time: about 1-7 working daysMajor country: Iraq, Iran,Pakistan ... visa.F/6Invitation 6month multy entry,30days stay each time,F visa.F/12Invitation 12month multy entry,30days stay ...