Ding Ling is a girl who loves to smile. Everyone who sees her smiling will ask: What are you laughing at? At this time Ding Ling would answer him: If I don't laugh, am I going to cry? Ding Ling didn't understand why they asked this question, and the person who asked the question didn't understand why Ding Ling laughed. A person's life is only a few decades, and it is really difficult to find someone who understands each other.