Very Risky, my gf got stucked

She went back in Spetember, not even bio field, she is hardware engineer and still waiting for the clearance, this has caused serious trouble on her work, life here , for Chinese, female and male are both suspects of Technology Transfer, regardless of your genger, if you are in the sensitive fields, you are very likely to be put on the check list and might cause months of delay. Check Columbia univeristy chinese students website, there are 700 chinese victums. I would recommand you for 3rd contry visa, u r unlikely to be stucked there.