The joke between two people is to enter the city with a pole

"The person who enters the city gate with a long pole" is a fool who cannot think about things, is very rigid, does not know how to be flexible, and cannot assess the situation and adapt to changes.

The "old father" is smart, likes to be a teacher, and makes people laugh.

This story illustrates three points:

1. Some things, even if they are not unsolvable, are not solved perfectly.

2. Sometimes, seemingly unsolvable problems can actually be solved by dividing and conquering, that is, turning big problems into small ones. In today's language, my father's method is non-uniform segmentation.

3. Although this is a joke, this joke tells people a truth: thinking should be flexible and not one-sided and stubborn.