Singer Teresa Teng. [Photo/Agencies]

Hong Kong pop singer Faye Wong is to complete a song left unfinished by Taiwan singer Teresa Teng, who died 20 years.

The song named "Qingpingdiao" is adapted from a work by famous ancient Chinese poet Li Bai, and the song will be partly sung by Teresa Teng.

Faye Wong will complete the latter half of the song at a studio on May 8, the day which marks the 20th anniversary of Teng's death.

The song will be released, with a video, in the near future.

Wong expressed her willingness to donate all the revenue from the song to charity groups.

Teresa Teng was a popular and influential pop singer in China, best known for her folk songs and romantic ballads.

She recorded many memorable songs, including "I Only Care About You" and "The Moon Represents My Heart".

She died from a severe respiratory attack in 1995 at the age of 42.