A story in history that made a joke because of illiteracy.

"Luo Yuan Mountain Man Collection" People born in the north who don't know Ling.

Those born in the north who don't know Ling are all officials in the south. Eat the diamonds on the table and shell the entrance. Someone said to him, "To eat water chestnut, you must remove the shell before eating." . The man defended his shortcomings and said, "I don't know, but the person who closes the shell wants to get rid of the heat." The questioner said, "Do you have this in the north? " ? " Answer: "there are mountains in front and mountains behind!" " Fu Ling was born in the water and called it a local product, so I don't know what I think I know.

There is a northerner who has never seen a water chestnut since he was born. Be an official in the south, eat water chestnut at the banquet, and put the shell in your mouth together. Someone said, "You should peel the water chestnut." Trying to cover up his mistake, he said, "I'm not ignorant. Eating shells together is to clear away heat! " "The questioner asked again," Is there a water chestnut in the north? " He said, "Where are the front and back hills? "Water chestnut obviously grows in water, but northerners say it grows in soil because he insists that he knows what he doesn't know.