The meaning of this sentence in "Autumn Water" is: "It is impossible to talk to the frogs in the well about the sea because they are limited by their living space; it is impossible to talk to them about the freeze with the bugs in the summer. It’s because of the limitation of life time;” It can be seen from this that a person must have great ambitions and a far-sighted vision, and cannot be complacent, so as to avoid shallow knowledge. This is a metaphor borrowed from things. Only by being good at learning and diligent in studying can one be knowledgeable and avoid being complacent and arrogant. In this way, you will not be as short-sighted as the frog in the well or the summer bug.