你用青春记住了谁我用青春记住了你
[nĭ yòng qīng chūn jì zhù le shéi wŏ yòng qīng chūn jì zhù le nĭ]
Means 'Whom did you remember in your youth? In my youth, I remember you.' It is romantic or nostalgic, reflecting memories and connections formed during the youthful years.