It's too late
As a Chinese idiom, Pinyin is B ù J í zh ī f ǎ, which means that laws and regulations are not applicable. It's from Zhuangzi pinthumb.
explain
Refers to laws and regulations that are not applicable.
source
In Zhuangzi's pinthumb: "it's not right to make the world play drums in an intransigent way?"
Examples
Some unreasonable special treatment should be abolished.
It's too late
A bandit who takes advantage of food - jī liáng jiè kòu
release a tiger to protect oneself -- to bring trouble on oneself while attempting to avoid it with other means - yǐn hǔ zì wèi