The attachment is the link to the sample file (.mp3).
This rough sample is made by myself, I tried my best to reproduce the main tune. I heard the origin work around 1995 from radio, and memorized the main tune very deeply.
It's like a smooth jazz thing, the lead instrument may be a guitar, and there's no lyrics just pure music.
Please help me find out what the music is, or give me a clue, thanks !