When she was young, Lin Yao threw herself wholeheartedly into loving Shen Yu, giving him all the affection in her heart. He neither rejected her nor took a step toward her. A snowfall scattered every lingering attachment. Three years later, they ran into each other on a pedestrian bridge, where he quietly admitted his regret. Lin Yao smiled faintly. An apology that came too late could not hold back someone who had already moved on. The evening breeze cannot carry you back to an old landscape. Once you miss your chance, all you can do is keep moving forward separately.
Core idea: Once you have given your all and your passion is spent, you don't have to turn back for affection that came too late. Let go of your regrets with grace and set out on your separate paths.
I like the ending very much. There is nothing sad about it, just the regret of being young.