1. Briefly describe the plot:, 2. The inspiration after laughing is.

Introduction: A man from Lu came into town with a long pole! Long pole is difficult to enter, long pole is difficult to enter.

Enlightenment from going to town with a pole

The fool who "walks into the city gate with a long pole" can't think, judge the situation and improvise. This "old father" is clever, a teacher by example, and humorous and generous. This story illustrates three points: 1, limiting the three-dimensional European transformation to two dimensions will lead to some things that are not so perfect, if not unsolvable. Sometimes, seemingly unsolvable problems can actually be solved by divide and conquer, that is, turning big problems into small ones. The old father's method is uneven segmentation in today's language. Although this is a joke, this joke tells people a truth: thinking should be flexible, not one-sided and stubborn.