道不拾遗（道不拾遺）　

◎ 道不拾遗 dàobùshíyí

[no one pockets anything found on the road;no one would keep lost articles found by the roadside] 无人捡取路上失物。形容刑法严峻,无人敢犯法。也形容民风廉直,社会安宁

为长陵令,道不拾遗。——《汉书·何并传》