First, I used to have fishing experience. According to related reports, we can know that grandpa is a person who likes fishing very much. He caught many big fish long ago. So, this time, when he put down the hook and went into the water, the hook began to move, which was unusual. He knew it was a big fish. This experience made him not pull the pole directly like a small fish, so that he finally caught a fish.
Secondly, besides having experience to judge that this is a very big fish, it is not enough to be very patient, because a fisherman who can harvest a lot must learn the tactics of fighting fish besides having rich experience. This tactic is available to uncle. Knowing that the fish was struggling, he deliberately slowed down the speed lever to let the fish relax their vigilance. When the fish relaxed, uncle slowly pulled the fish to the shore, and finally he couldn't leave the shore, which was also the key to his success.
Third, dare to fight with fish. Of course, in the face of a big fish, if you have rich experience but don't have the courage to catch him, you can't get it. Therefore, it was this uncle's unhesitatingly behavior that didn't let go in the process of fighting with the fish, which made him harvest such a huge fish.
In fact, uncle's fishing experience can tell us that being born as a human being requires not only rich experience, but also enough flexibility and courage to make himself successful.