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官网上这么说的,可是没有说适当提前是多久,很含糊地说
如果申请的是属于最长10年有效的签证,如Q2(短期探亲)、L(旅游)、商务(M)和S2(私人事务),因为该类签证有效期根据你的护照有效期和停留期决定,最长可达10年有效,因此,可以适当提前申请。 请注意,从2015年10月15日起,申请人应事先在在签证中心的网站预约,然后凭预约号递交申请