Léishēng dà, yǔdiǎn xiǎo.

雷聲大, 雨點小。

Lit [When the] thunder is loud, [the] raindrops are small.

Fig (It is often the case that) those who engage in a lot of talk about (doing) something in fact take very little or no action on the matter. “Much talk, little action.” “Much cry and little wool.”

Note [Cf. Jīn Píng Méi (JPM), chap. 20.]

Topics ACTION BRAGGING JPM TALK