What's the joke about elephants? "Know that I didn't ... shook my head ... jumped down ..."

One day, the king of Qi tried to recruit Xu and met a difficult problem. Let the elephant shake his head first, then let the elephant nod, and finally let the elephant jump into the pool so that he can be a promise. Many people come from all over the country, but elephants are very uncooperative. No one can do it. The king was disappointed. Finally, a beggar came. He said I had an idea. The king said, well, try it. The man walked up to the elephant and said to the elephant, do you know me? The elephant shook his head. He said to the elephant, You are so handsome. The elephant nodded and his knife stabbed the elephant's ass. The elephant jumped into the pool at once. The king didn't want the beggar to be his son-in-law, so he said, No, I'm going to stab you in the ass with a knife, so you jump into the pool. The beggar went to the elephant again and said to the elephant, dare you pretend to be B? The elephant shook his head and said to the elephant, now you know me. The elephant nodded and said to the elephant, then you know what to do. The elephant jumped into the pond at once.