You Are Brighter than the Sun

This is book 5 of You Are Brighter than the Sun.

She randomly grabbed a man off the streets after finding out her stepmother had been plotting to marry her off to a forty-year-old man. 

"Do you want to marry me?" Jin Liyuan's girlfriend had just stood him up, so his lips curved into a small smile as he said, "Sure. I just happen to have my household registration booklet with me. Let's go register our marriage." 

This was how 23-year-old Yin Xiaoxiao ended up in a whirlwind marriage with a man who she had only met twice.