當愛已成往事 - 國語版

當愛已成往事 - 國語版 is a melancholic song by Sandy Lam with a tempo of 123 BPM. It can also be used half-time at 62 BPM or double-time at 246 BPM. The track runs 4 minutes and 40 seconds long with a G♯/A♭ key and a major mode. It has low energy and is not very danceable with a time signature of 4 beats per bar .