A frog in the well is short-sighted and unpredictable.

Antisense is well-informed, all-encompassing and impeccable.

Sit at the bottom of the well and look at the sky. Metaphor is small in vision and little in knowledge.

Tang Hanyu's source of "The Original Road": "Sit in the well and watch the sky, saying that the sky is not small."

My apprentice wasted his life, and the mountain gate never came out. He is a well-matched generation. (Wu Ming, Cheng En and The Journey to the West, the sixteenth time)