Swing Me to Your Heart.

Qiao Xingye was switched at birth and left to fend for herself. Picked up by Qiao Rongchuan as a child, she grew up alongside him as his sister in Italy. One day, she decided to seek out her biological family and return to Hong Kong, where she lived for three years without his protection. During that time, her adopted sister Liang Yutong tried to kill her, her biological mother and brother treated her like an outsider, and her fiancé abandoned her for Liang Yutong. When Qiao Rongchuan finally finds her, he helps her get back at everyone who had betrayed her. During their time in Harbor City, Qiao Xingye discovers she has a more pressing problem to face—has she fallen in love with Qiao Xingye, her adoptive brother?