The female protagonist was dumped by her boyfriend and cried in the park. After picking up something, she became beautiful.

I can't provide you with the information you want. According to my knowledge, there isn't a novel where the female protagonist is called Yang Xiaochen, nor is there a novel where the female protagonist is dumped by her boyfriend and then becomes beautiful after crying and picking up something in the park. These novels were often called fantasy, magic, or science fiction, which did not correspond to the real world. If you have any other questions, I'm happy to help you.