In 2004, Mr Jolan Heung, one of the Committee Members of Lifeline Express (LX) invited Chelsia to write a theme song for LX's mobile hospitals.  In 2005, 'Longan Tree in Homeland 家鄉的龍眼樹' was produced, with lyrics written by both Chelsia and Jolan.  Sung by 4 superstars : Jacky Chan, Alan Tam, Jacky Cheung and Andy Lau, this song was recorded and all sales were gone to LX.