The Most Beautiful Coser in the World

I am not exaggerating the beauty of the Chinese girl named MengXi. It is a very strange name for me. She cosplays a mystic dancer. And she seems like an angel with lovely smile. Oh, the charming coser fascinates me every time. You know, there are many nice super cover girl nowadays, but this girl, this coser, gives me a brand new feeling. I have kept these items in my computer. Great. And, I am just wondering which role she cosplay from. Game, anime, or manga? I have been doing some research about this issue for a long time, but there is nothing. So, any cosplay sweet here, if you are willing, just give me some information of the beautiful lady. I will be thankful from the bottom of my heart.