Shu Jing

She is the friend of Chen Zhigang.

Plotline
To allow Chen Zhigang to challenge Xia Tian again after he lost their bet for Sun Xinxin, she proposes to become Xia Tian's wife if he wins against Chen Zhigang in their 2nd bet.

He accepts but she will be a "wife candidate" because he need to test her. (chapter 68)

He finally promote her to official wife, when he see her in new dress. (chap 337).

She eventually uses the pocket money she got from Xia Tian to make a fitness club near her university where she stays a lot of the time.

Trivia
She has her first time with Xia Tian in chapter 1259.