1. 刚给哥哥一家申请移民，会影响哥哥和小侄女儿暑假申请探亲签证吗？
-It should not because it takes more than 10 years for them to immigrate to US, but need to tell the truth during the visa application. By the way, the I-130 petition is only related to your brother, not the other family members. So, his kid will not be affected for the F-1 study (not need to report this I-130 petition during her B2 visa or F-1 visa application).
如果有影响，是否应该申请旅游签证，他们只想来玩一个月
2.今后如果侄女有意向出来读高中（那个时候绿卡还遥遥无期）， 申请F1来读书可以吗？-Yes. 会影响移民申请吗？-No.
