What's the meaning of the poem "The Boat Passes Anren"?

1, Zhoudu Anren means: There are two children on a fishing boat. They put away their bamboo poles and paddles and sat on the boat. No wonder they opened their umbrellas before it rained. Not to shelter from the rain, but to use an umbrella instead of a sail and use the wind to let the boat go forward.

2. Zhou Du An Ren is a seven-character quatrain written by Yang Wanli, a poet in the Southern Song Dynasty. ;

3. The full text of his ancient poems is as follows:

On a fishing boat, there are two children. They put away their bamboo poles, stopped their oars and sat on the boat.

No wonder it didn't rain. They opened the umbrella. They didn't want to protect the rain, but wanted to use the umbrella as a sail to let the boat go forward.