我父亲3年前来过美国,但是因为现在规定改了,所以要申请他了
I don't understand what you meant. Your father did not need a US visa to come to US three years ago?
The invitation is just a letter, it can be long or short. and it (for the purpose of 探亲) usually has minimal effect on the success or failure of B visa chance.
I don't understand what you meant. Your father did not need a US visa to come to US three years ago?
The invitation is just a letter, it can be long or short. and it (for the purpose of 探亲) usually has minimal effect on the success or failure of B visa chance.
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