a rat in a hole
Turtle in a urn, a Chinese idiom, Pinyin is w è ngzh ō ngzh ī Bi ē. It means something that is under control and cannot escape. From Yu Shi Ming Yan.
The origin of Idioms
Feng Menglong of Ming Dynasty wrote a general statement of warning the world: "Sun Fu regarded the ten niangs as turtles in the urn, and ordered his children to send the gold writing stationery and put it on the bow of the boat."
Idiom usage
These little Southern barbarians are just a few. They don't have to spend a lot of money. They have to be disciplined one by one. (Chapter 76 of the complete biography of Shuoyue by Qian Cai in Qing Dynasty)
Analysis of Idioms
Catch a turtle in a jar
Chinese PinYin : wèng zhōng zhī biē
a rat in a hole
Take the cloud and grab the stone. ná yún jué shí