undergraduate degree in a top 3 university in China; master degree in a top 10 US university, also an Ivy league university.
GRE: 530V, 800Q, 4.0W
I think what really helps is the master GPA (4.0/4.0) and research experience in US, and also two reference letters from the biz-school professors and another letter from a SEAS professor. Two of them know me really well. I guess another thing is I made presentation at ISMP, which is the Olympics in math programming field (correct me if I am wrong). So attending the conference that everyone knows (like INFORMS, ISMP, etc.) could help, I think ~