Unlike other Race07 addon tracks, Jiading doesn't contain UIData files. But it works fine
As far as I know UIData is related to menu flag icon, track map which is showed on track selection, and there will be some more, but I don't know any further
I already installed Zhuhai 2004, so I had china flag. Maybe Jiading use that flag. Except track map, everything is well to me. This is not a problem to me.