What if there were no ghosts to capture? To the west, who cares about the number of ghosts! What if there were no more corpses to refine? Go to the west, where can we bury people without using fire! What if he didn't have a place to teach? To the west, where would there be so many stupid believers?
What should he do if there was too little to eat? "Go to the west, master of the five elements!" Go to the west, where are you going to get so much money?