Jiājiā mài suān jiǔ; bù fàn shì gāoshǒu.

家家賣酸酒,不犯是高手。

Lit [When] every [wine] shop is selling sour wine, [the ones who] don't [appear] to be top notch [by comparison].

Fig Small cheats get caught, but the master criminals get away.

Note [Rhyme.]

Topics CHEATING COMPARISON CRIME INJUSTICE rhyme