The song is a vocal portrayal about the tragedy involving the lead pair, about how their love couldn’t succeed. Its lyrics seamlessly fit in with the music, which is heavily based on a piano score accompanied by some soft drum beats. Its the perfect song to be listening to with your love. The movie version is sung by the lead pair themselves- Jackie Chan and Kim Hee Sun, (JC & KS) while the soundtrack of the movie contained another version sung by world renowned Asian artistes- Sun Nan and Han Hong. (SN & HH)
The (JC & KS) version is soft and establishes the main theme, music etc of the song. But, as the song is addictive, repeated listening to the song might cause a feeling of monotony. The (SN & HH) version adds more spice and variety to the song, with more emotions in rendering the lines- all in all, a more passionate number.
Both versions follow the same tune, but different lyrics (you wont actually make out the differences though- its all Chinese and Korean).
Here’re the piano scores for this song, along with all the lyrics with translations.