What do you mean, Sun Tzu has finished paddling?

Grandpa, an anecdote in the sea, said, "Dear grandson, the paddle has been finished."

A long time ago, an old man took his grandson out fishing. Unexpectedly, he was caught in a tsunami. The grandson was very worried and said to his grandfather, "Grandpa is going to have a strong wind. Let's go home. " But his grandfather refused: "dear grandson, grandpa has never seen any storms, and he will be fine." As soon as the voice fell, a huge wave came and interrupted the paddle of rowing. So grandpa said, "Dear grandson, the paddle is ready."