Sources used:
https://open.spotify.com/track/6TI28m4PqtemDHXdBOvU4z?si=58d33eb5c33244b6
https://www.discogs.com/葉麗儀-千金一刻-/release/12400336
Language: Chinese, but in fact it is "Cantonese" (maybe I overlooked, but I couldn't find it)
Youtube info was very helpful:
This a Cantonese version of an Italian song, "Io che non vivo (Senza te" in 1965. Pino Donaggio and Vito Pallavicini co-created the tune.
There is an English rendition of this song. The name is "You Don't Have To Say Goodbye To Me." British singer, Dusty Springfield first covered this version in 1966. Vicki Wickham and Simon Napier-Bell co-wrote the songs in this English version. Many singers cover this version including Elvis Presley, Teresa Teng, etc.
葉麗儀 or Francis Yip covered this version in 1982. It first appeared from the 千金一刻 album. 鄭國江 wrote the lyrics in Cantonese.
我相信你 (原曲:Io che non vivo (Senza te) )
作詞:鄭國江 作曲:Pino Donaggio/Vito Pallavicini
Other links to allow for verification: