Three years is not a long time, but it can change a lot. Three years ago, he stretched out his hands and opened his arms to the young man. Three years later, he was still waiting in place, guarding the agreement, waiting for the young man to return. And whether that young man still remembers that agreement, whether he still retains that heart, whether he will still hold his sleeve corner as he did three years ago, and whisper: "Lin, you are so kind."