What are the seventy-two changes and the seventy-three changes?

What exactly are the "Seventy-two Changes"? In fact, the "Seventy-two Changes" are the highest state of changes in Yin, Yang and Five Elements. "Seventy-two" represents "many" and "infinite". It does not mean that "seventy-two changes" means seventy-two changes. One more or one less will not work. The real meaning of "seventy-two changes" is "many changes" or "endless changes". Although the book "Journey to the West" does not specify what the "seventy-two transformations" are, the nature of "transformation" can be seen from the author's description of Sun Wukong's magic: 1. It can change oneself or other things. Change. 2. Transformable into humans, plants, animals and even inanimate objects. 3. It can change into a man or a woman; it can change into an old person or a young person. 4. It can be made longer or shorter; it can be made bigger or smaller. 5. Variable None.