Jacky Cheung, the 2010 World Expo ambassador for Hong Kong, has led a group of well-known singers in recording the Cantonese version of Hong Kong's theme song for its participation in the Shanghai Expo.

Jacky Cheung, Eric Suen, Kay Tse, Hins Cheung and Keeva Mak, along with the band Mr, laid down the Cantonese tracks.

Another well-known star, Eason Chan, will sing the Putonghua and English versions of the theme song.

The song will be featured in a short promotional video to be broadcast on local television channels from this week.

The song - "A City with Unlimited Potential" - was composed by Eric Suen, with Cantonese lyrics by Chan Siu-kei.

Radio Television Hong Kong was responsible for the overall co-ordination of the theme song's production, including the short promotional video.

The tune echoes the theme of the Hong Kong Pavilion at the Shanghai Expo, paying tribute to the core values and attributes of Hong Kong as Asia's world city.

Hong Kong singer Jacky Cheung was named the 2010 World Expo ambassador to promote the event in the region.

Jacky Cheung said he was delighted to play a part in promoting Hong Kong's participation in the Shanghai Expo, and was looking forward to visiting the Hong Kong Pavilion and Hong Kong's Urban Best Practices Area Exhibition during the six-month Expo period.

The video and song will also be uploaded onto Hong Kong's Expo website www.hkexpo2010.gov.hk.