ㄒㄧㄢㄌㄧˇㄏㄡˋㄅㄧㄥxiānlǐ‑hòubīng

先礼后兵
  1. 禮節相待使用武力其他硬手段

peaceful measures before using force (idiom)​; diplomacy before violence, jaw-jaw is better than war-war