Sitting in a well and looking at the sky zjgt A frog near the bottom of a well, a mouse is short-sighted, and a tube is short-sighted. zuò jǐng guān tiān On the contrary, it is knowledgeable, all-encompassing, and impeccable. This comes from "Yuandao" written by Han Yu of the Tang Dynasty: "Those who sit in a well and look at the sky say that the sky is small. "It's not a small thing." Explained by sitting at the bottom of the well and looking at the sky. It is a metaphor for having a small vision and little knowledge. Usage: Linked tense; used as predicate, object, attributive; with derogatory meaning Example: My disciple spent his life in vain and never left the mountain gate. As the saying goes, he is a good match.
(Chapter 16 of "Journey to the West" by Wu Chengen of the Ming Dynasty)