我有朋友咨询美国旅游签证的问题：
1. 每次最长呆6个月吗？
-Yes, but you may file I-539 to apply for the B-2 extension within US for up to another 6-month term.
2. 六个月后，需要回国才能第二次来，还是可以去别的国家呆一段时间，不回国直接再来美国？
-You had better go to China and come back=, thus you may get another 6 month period.
非常感谢
