事不关己，高高挂起

Explanation: That it had nothing to do, whether it aside. 　　Source: Mao Zedong, "Combat Liberalism" is a matter not related to an armchair; knowingly wrong, your tongue; play it safe, but they try too. This is the third. " 　　Examples: ~; Knowingly wrong, your tongue; play it safe, but they try too. This is the third. (Mao Zedong, "Combat Liberalism")