申请二次入境有效F（包括团体）签证须提供一类或者二类授权单位邀请函电；
To apply for repetitious valid F visa needs to provide a letter or telegram from the senior authorized organizations.
申请二次入境有效F（包括团体）签证须提供一类或者二类授权单位邀请函电；
To apply for repetitious valid F visa needs to provide a letter or telegram from the senior authorized organizations.
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