Ming Xi is wearing a cropped jacket from the Resort 2012 collection by Proenza Schouler.
You can shop at the Outnet the matching dress and skirt :
Woven tweed dress / Woven tweed mini wrap skirt
The same dress is on sale at My Theresa too :
LEATHER DETAILED WOVEN SHEATH DRESS
You can also shop her Ann Demeulemeester shoes at farfetch through H. Lorenzo (USA) :
ANN DEMEULEMEESTER Wedge sandal