how's your background in economics and mathematics?
e.g. whats your grade in multivariate calculus, linear algebra, calculus-based prof and stat, and intermediate micro and macro?
and how much senior year math & stat course you have taken? (e.g. time series, inference, stochastics, real analysis, optim, numerical)
and 双非 = which level? still within 一本 or not? appoximatly within top XX within China?