The mother taught her son to write jokes.

In other words, my son thinks that one is to draw one stroke, the other is to draw two strokes, the third is to draw three strokes, and the fourth is to draw four strokes … and so on.

He told his father that he had learned everything and did not need to learn any more. His father is happy to invite everyone to play and let his son write invitations. But my father's surname is Wan, and my son hasn't finished it for a long time. When the father saw it, his son was rowing and said it hadn't arrived yet 100. ...