1. No
2. Call the same number again with PIN Card, cancel the original, and book the new date
3. Depends on what kind of 邀请信. if you are applying B1 for business trip, 邀请信 need be original because you want the VO to believe it. if it is from your son/daughter, a print one will be ok, it is not even needed.
同行者
2010-03-11 08:56
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匿名天使 (未验证)
2010-03-11 11:00
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1. No
2. Call the same number again with PIN Card, cancel the original, and book the new date
3. Depends on what kind of 邀请信. if you are applying B1 for business trip, 邀请信 need be original because you want the VO to believe it. if it is from your son/daughter, a print one will be ok, it is not even needed.