Meng Xun and Duan Cheng met during the summer vacation of their third year of junior high school, fell in love during the winter vacation of their sophomore year of high school, separated during the summer vacation of their sophomore year, and reunited at the door of the ICU ward ten years later. When Meng Xun left, he left a letter to Duan Cheng. The letter said: Come to the world for a visit. You want to see the sun and walk on the road with your sweetheart.