问：我的商务旅游签证(B-1/B-2)在到达美国后到期，我离开之前需要申请新签证吗？

答：签证持有人可在签证有效期内任意时间（包括到期日）进入美国境内。美国海关与边境保护局官员将在签证持有人抵达时决定其在美国的停留时间。即使在美国境内时签证到期也没有问题，只要不超过前述官员规定的停留时间即可。

Q：My visitor visa (B-1/B-2) expires after my intended date of arrival in the United States. Do I need to get a new visa before departure?

A：You can arrive in the United States right up to the last date of validity indicated on the visa. The Customs and Border Protection officer on arrival determines the duration of your stay in the United States. Your visa can expire while you are still in the United States just be sure that you do not overstay the period of time the officer grants. More info: http://www.ustraveldocs.com/cn_zh/cn-gen-faq.asp#ch-simp-faq-applicant-profile