Love is either a lifelong thing or a stranger. This is Liu Xu's favorite sentence, because she explains the relationship between her, Song Yi and Yang Shu very well. At that young and ignorant age, she loved him, he gave up on her, but he waited for her. But when Liuxu really accepted Yangshu, she didn't expect that an accident almost separated them. From then on, Yangshu avoided her and ran away from her because of her love for Yangshu. Because I love catkins, I chase him and look for him. When he is in her, she lives; when he dies, she is destroyed.