Little Princess Came Back Radiant

Jiang Li hid who she really was and let everyone think she had no money. To save her fiancé Tang Haotian she stayed in the sea for three days, which wrecked her health. The hormone treatment that followed pushed her weight up to 200 pounds. Once Tang Haotian has power he is disgusted by her, takes up with his first love, arranges his own brother's death and takes over his identity. Jiang Li learns all of it and decides to pay him back. She meets Lu Chen, a CEO she knew as a child, who tells the Tang family that if his wife loses so much as a pound they are finished. With a doctor's help she gets her body back, and she walks into the wedding that was set up behind her back to make her first move, telling Lu Chen the enormous debt can count as her wedding present.