井底之蛙 (jǐng dǐ zhī wā)

lit. a frog at the bottom of a well (idiom); fig. a person of limited

Character breakdown

Usage

如果不多出去看看,就会变成井底之蛙。

If you don't go out and see more of the world, you'll become a frog at the bottom of a well.

Rú guǒ bù duō chū qù kàn kan, jiù huì biàn chéng jǐng dǐ zhī wā.