长治久安 (長治久安) cháng zhì jiǔ ān

cháng zhì jiǔ ān set phrase long order and long peace; long-term peace and stability
Domain: Idiom 成语
Notes: Here 长 means 'long', 治 means 'order', 久 also means 'long', and 安 means 'peace'; the expression refers to a nation-state (CCI p. 37; CC-CEDICT '長治久安'; Guoyu '長治久安')