What is her name ?

Okay, you'll need to bear with me here, because the answer is not exactly straightforward. It is, however, correct, albeit dissatisfying.

Here name is 戴米, or transliterated to the Latin alphabet Dai Mi. Here's how I know that:

The picture you have posted, is from ugirl.com's photoset [T025]七情 (Seven Emotions), which can be viewed in full here:
http://www.sopicsee.com/m/view.php?aid=308093
(Her first image is on page 5, last picture and the last of her images in on page 8)
Offical page:
http://www.ugirls.com/Shop/Detail/Product-394.html

On the first link I have provided, all six models in the photoset are named in the title in order of appearance, i.e. 阿V (Ah Vee)、温心彤 (Wen Xin Tong)、奶油 (Nai You)、戴米 (Dai Mi)、田慕儿 (Tian Muer) and 艺轩 (Yi Xuan).

Now, except for Dai Mi, who, according to the description on ugirls.com, has had her debut in this photoset, each of the models have a page on ugirls.com:
阿V (Ah Vee): http://www.ugirls.com/Models/Detail/Model-650.html
温心彤 (Wen Xin Tong): http://www.ugirls.com/Models/Detail/Model-583.html
奶油 (Nai You): http://www.ugirls.com/Models/Detail/Model-703.html
田慕儿 (Tian Muer): http://www.ugirls.com/Models/Detail/Model-666.html
艺轩 (Yi Xuan): http://www.ugirls.com/Models/Detail/Model-665.html

This allows us to clearly identify all the models in the photoset except for the one on your image and with one model and one name left, it is clear, that she is, in fact, 戴米/Dai Mi. This is somewhat dissatisfying, because except for the 15 photos in the series there is no more material on her at present.

Okay, you'll need to bear with me here, because the answer is not exactly straightforward. It is, however, correct, albeit dissatisfying.

Here name is 戴米, or transliterated to the Latin alphabet Dai Mi. Here's how I know that:

The picture you have posted, is from ugirl.com's photoset [T025]七情 (Seven Emotions), which can be viewed in full here:
http://www.sopicsee.com/m/view.php?aid=308093
(Her first image is on page 5, last picture and the last of her images in on page 8)
Offical page:
http://www.ugirls.com/Shop/Detail/Product-394.html

On the first link I have provided, all six models in the photoset are named in the title in order of appearance, i.e. 阿V (Ah Vee)、温心彤 (Wen Xin Tong)、奶油 (Nai You)、戴米 (Dai Mi)、田慕儿 (Tian Muer) and 艺轩 (Yi Xuan).

Now, except for Dai Mi, who, according to the description on ugirls.com, has had her debut in this photoset, each of the models have a page on ugirls.com:
阿V (Ah Vee): http://www.ugirls.com/Models/Detail/Model-650.html
温心彤 (Wen Xin Tong): http://www.ugirls.com/Models/Detail/Model-583.html
奶油 (Nai You): http://www.ugirls.com/Models/Detail/Model-703.html
田慕儿 (Tian Muer): http://www.ugirls.com/Models/Detail/Model-666.html
艺轩 (Yi Xuan): http://www.ugirls.com/Models/Detail/Model-665.html

This allows us to clearly identify all the models in the photoset except for the one on your image and with one model and one name left, it is clear, that she is, in fact, 戴米/Dai Mi. This is somewhat dissatisfying, because except for the 15 photos in the series there is no more material on her at present.