事不关己

a matter of no concern to oneself (idiom)

matter / thing / item / work / affair / CL:件[jian4],樁|桩[zhuang1],回[hui2]

no; not so / (bound form) not; un-

mountain pass / to close; to shut; to turn off / to confine; to lock (sb) up; to shut (sb in a room, a bird in a cage etc) / to concern; to involve

self / oneself / sixth of the ten Heavenly Stems 十天干[shi2 tian1 gan1] / sixth in order / letter "F" or Roman "VI" in list "A, B, C", or "I, II, III" etc / hexa

to feel unconcerned and let matters rest (idiom)