Jokes of scholars and rich people

This couplet seems to be: pigs are as big as mountains, and mice only die to be jealous.

Rich man's thought: raising pigs is as big as a mountain mouse, only death. Vinegar is good in the wine-making jar, but sour in the jar.

Scholars read: pigs are as big as mountains, but rats die. A good wine-making jar makes the vinegar jar sour.