feed a tiger to one 's own detriment
As a Chinese idiom, the Pinyin is y à NGH à y í Hu à n, which means to connive at the enemy and keep the future trouble. It's the same as "raising tigers has its own problems.". It comes from Zhang Juzheng's answer to Huang Ba and ER Lu, governor Ji Chu of Xuanda in Ming Dynasty.
The origin of Idioms
Zhang Juzheng's answer to governor Xuan Ji Chu Huang Ba Er Lu in Ming Dynasty: "what's the so-called strategy of leading thieves into the house and raising tigers to cause trouble?"
Analysis of Idioms
Synonym: keep the tiger alive
Idiom usage
To connive at the enemy
Examples
It's better to forget it than to raise a tiger. Chapter 7 of Kong Jue's biography of new heroes
feed a tiger to one 's own detriment
centralize power on major issues - dà quán dú lǎn