Heard this song on the HK drama 东方之珠 "Glittering Days" yesterday and it got stuck in my head.
The scene was very touching because the singer was dying of cancer and trying to record this final song to her album before she died. She would also be leaving behind a son. I guess, the fact that I can find this first video on Youtube means others also found this moving.
This version is by the original singer 尤雅, unfortunately, a KTV version.