Sam Hui had a few dozen evergreen classics in 1970's and 1980's/ Among so many of Sam's hit, 雙星情歌 had been 'exported' to Non-Chinese speaking South East Asia market. 雙星情歌 melody had been a popular hit and sung in Thai language too.
I just heard the song at The Taste of Asia 2022 in Toronto, Canada. Amazing version of this song. 2 guitars. Violin. 2 males singers. Drummer. Perfect.