ㄉㄠˋㄅㄨˋˊˊdàobùshíyí

道不拾遗
  1. 路上失物無人占為己有形容社會風氣良好路不拾遺」。 道不拾遺夜不閉戶理想大同世界寫照」。

lit. no one picks up lost articles in the street (idiom)​; fig. honesty prevails throughout society, a time of peace and stability