The rat bustles in the countryside
It used to refer to the area where the folk custom was thin and the curfew was rampant. It's the same as "living in the same country".
Idioms and allusions
[source]: preface to oneself by Gong Zizhen in the Qing Dynasty: "in today's world, there are poor Zou, desolate shore, and mice in the countryside."
Discrimination of words
Usage: used as object and attribute; refers to the place where bad people gather
The rat bustles in the countryside
take instant advantage of an opportunity that comes only once in a long while - jiàn tù gù quǎn
No matter what you do, you don't get much wisdom - bù jīng yī shì,bù zhǎng yī zhì