Roll out means nothing. The ARJ was roled out a few months ago. But the 787 was rolled out a long time ago. The 787 won’t fly any time soon though since it used fasteners from the local B&Q and the engine nacelles where cardboard. But since it was important for PR reasons to roll out at 07/08/07 (US date notation) they took desperate steps. Who knows if CAAC did something similar with their 717 ARJ.