In Ping Cheng, five million would be more than enough for her to purchase a large house for her younger brother. She would even have enough leftover to buy him a small BMW so that he could get married. In short, the five million yuan would help settle the most important event of her brother's life, and her brother would lead a comfortable life from now on.
Even if it was not for herself, she had to try her best for her brother's sake. Although this was a piece of good news, she had kept it from her family. In case she was unsuccessful, her family would have gotten excited over nothing if they had learned about the five million yuan.