Last night Jackie put in a surprise at Rain's Concert at the Hong Kong AsiaWorld-Expo.
Jackie said that he showed up because Rain supported his charity concert at Bird's Nest Stadium in May and Rain said that he was very honoured to have Jackie at his concert because Jackie has always been his idol.
PHOTO SLIDESHOW HERE
Source: SOHU.COM or TRANSLATED
Another article HERE which talks more about the concert.
Blog entry in English HERE and several more photos at THIS BLOG