xīn qù nán liú
去：离开。心已在别处，难以挽留。
南朝梁·王僧孺《为姬人自伤》诗：“断弦犹可续，心去最难留。”
心去难留作谓语；用于劝诫人。
When one's heart is gone, it is difficult to keep his body.
