On the rooftop at night, he survived. Xu Ruoxi, who has terminal cancer, and Lin Yichen, who is severely depressed, take each other's courage and embark on a journey of questioning life. Go to the fields, go to Tibet, enjoy life and experience emotion. Many people, including Zhu Yu and Grandpa Amu, were moved to tell them the meaning of life during the ceremony at the grave. The journey of life never ends. People in the world are redeeming each other. If you ask me why I want to continue living. I would answer: because of the kindness of the world. I would like to dedicate this book to those who are in deep pain, and wish you a bright future.