The last time I saw Meng Huaifeng, he was standing not far behind Meng Huairou and watching me quietly. He never came forward to say goodbye to me. When Huairou urged me to get in the car, the boy turned around and left, as if he was not in a hurry. I shook my head and shouted to him with a smile: "Huai Feng, I'm leaving! Remember to come see me when you have time in the future." Although I knew it was unlikely that he would come, I felt that I should still tell him. He stopped and didn't answer me. As the train slowly passed by, the picture of Huairou waving to me with a smile on his face and the picture of Huai Feng still bowing his head and turning his back to me gradually shrank until they were no longer visible. That was the scene when I left the Meng family to return to Beijing and got on the train ten years ago.