One hundred thousand jokes the Monkey King changed seventy-two to the Dragon King and gave him the golden cudgel. Why?

Oh, yes. Xiao Jingang said that the golden cudgel should not be used for personal use. The wet dragon king has been using it for himself, and then the golden hoop stick can only get smaller and smaller, but the seventy-two can not only get smaller and smaller, but also become other shapes (eggplant, cucumber, banana, carrot thread particles ...) ... seventy-two is much more convenient than the golden hoop stick, so we changed it.