解铃还须系铃人
[词典] In order to untie the bell, the person who tied it is required.; It is better for the doer to undo what he has done.; Let him who tied the bell on the tiger take it off.; Let the mischief-maker undo the mischief.;
[例句]有些事，解铃还须系铃人。
Some things on the department should be.