-B-2 visa is for both 旅遊和探親. So, you may just invite your sister and your parents together to visit you and make tour at the same time in US. They can make the appointment at the same time and go together for the visa interview.
簽證時可以在一個窗口嗎?因為我想讓姐姐簽證時可以陪老人一起。
請問探親簽證和旅遊簽證的最新要求的材料到哪裏去找? 需要提前多久預約?
-Read these links:
http://www.ustraveldocs.com/cn_zh/cn-niv-typeb1b2.asp
http://www.ustraveldocs.com/cn_zh/cn-niv-passporttrack.asp
http://bbs.wenxuecity.com/immigration/525677.html
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