How did the male lead manage to woo the female lead?

Find a novel. The female protagonist is called Lin Lan (a lot of romance stories have this name). The male protagonist is a CEO, but at the beginning of the story, the female protagonist has a boyfriend who is studying in the United States. While studying abroad, he was poached by another woman. He was caught in Las Vegas and broke up with her. Later on, the female protagonist's mother seemed to have owed a huge gambling debt, and the female protagonist was forced to become the male protagonist's mistress. The plot at the end of the story was broken.