actually, the old man didn't want to appear. As Kimura Fujino said, he hasn't appeared for many years. Even three years ago, in order to solve the big problem for Su Hao, he just appeared a little in front of people for two or three days, and then disappeared again.
it's the same this time. Otherwise, the old man doesn't have to tell Su Hao to solve the problem.
it's just that the forces standing behind Fujino in Mucun are in some trouble. Besides, Fujino in Mucun is not a cat or a dog. His own strength is there, so the old man runs here unwillingly.
the old man didn't...