ㄗㄨㄛˋㄐㄧㄥˇㄍㄨㄢㄊㄧㄢzuòjǐng‑guāntiān

坐井观天
  1. 比喻眼界狹窄有限 學問擴大視野不可坐井觀天」。

lit. to view the sky from the bottom of a well (idiom)​; ignorant and narrow-minded