Which guy has an animation of "cutting the pole into the city", please provide it, thank you!

[Story]

There is a man in Lu who wants to go to town with a bamboo pole. When I reached the city gate, I couldn't get in because the bamboo pole was too long. He first erected the bamboo pole and got stuck in the hole at the city gate. Later, the bamboo pole was turned sideways and it was still stuck. I couldn't think of any way, so I just stared at the door. At this time, an old man came over and saw this situation. He said to the Lu people, "How can this little thing stumped you?" Can't you saw this bamboo pole in the middle? "Lu people did as the old man said, and as a result, the bamboo pole was useless at the gate.

[Morality]

You can't remember what the fundamental purpose is, otherwise you can only be smart and futile.