One day during the Song Dynasty, the sky was gloomy and it started to rain heavily. The white-haired Lu You was lying on the bed, his face showed pain and sorrow, and tears filled his eyes. The son sat next to him, looked at his father affectionately, and said distressedly: "Father, hold on, I will help you boil the medicine." Lu You used all his strength to hold his son's hand, and said dyingly: "Son, please hold on, I will help you boil the medicine." Don't waste your efforts, I'm dying." "How could it be possible? Father, you are still in good spirits, you still have a long life." The son comforted Lu You. Lu You shook his head and said, "Stop comforting me. I know my own body very well." "What I worry about most now is that the motherland has not yet been reunified. Otherwise, I will not rest in peace. I just want you to promise me one thing..." Lu You sighed. say. The son stroked his father's head and said, "Father, please tell me, I will agree to anything you say." The father gasped and said, "The Song Dynasty's army can regain the Central Plains. Don't forget to tell me when you worship your ancestors. "On his deathbed, Lu You warned his son again and again, and then closed his eyes forever. Just like that, Lu You passed away with regret. After Lu You's relatives learned of his death, they all burst into tears and washed their faces with tears. The son remembered his father's dying instructions, cheered up and made up his mind to participate in the Song Dynasty's army training. So, every morning at dawn, he would get up and train harder. Although the hard training and injuries every day made him tired and unbearable, he felt that the injuries on his body were nothing because of his father's instructions before his death. In this way, he became an outstanding general, regained the lost territory, and fulfilled his father's last wish.