Are Joe cheng and Ariel Lin have relationship?

no... they are not in a relationship! -.-'although people want them to be because they really have many chemistry together on screen and off screen, they called each other lao po and lao gong becasue of ISWAL and TKA;D too bad they are not in a relationship, and no they are no denying it.. if you have catch up some of their news, they are really close friends and during the filiming process they did have feelings for each other, but that's because they were too in to their character ;] ... that's why joe cheng once said that he's not sure if he's in love with ariel or xiang qin;]