1）我一个亲戚S，S的外婆和我的外公是兄妹，那S想来美国玩几个月的话，可以算探亲吗？
-Fine.
还是说这种情况只能签旅游签证？
-The same visa type (B2 visa) for 探亲 or 旅游. Just use "探亲和 旅游" as the reason for the visa application.
2）如果算探亲，那我需要提供什么样的证明材料呢？
-It is somewhat complicated in your case to prove your relative relationship with S, and you may figure it out by yourself. If you can not get the documents to prove the relationship, it does not hurt the B2 visa application that much and S may just explain it to the visa officer. The critical thing is that S has to prove his/her has no immigration intent by showing his/her connection to China tightly.
You may need to provide a invitation letter, your status proof such as H1 approval notcie/I-94, or green card, etc. and provide the I-134, financial support for travel expenses.
3）如果签旅游签证，是不是只能跟团，
还是说可以自己直接签个人的旅游签证？
-Fine.
先谢谢了
