《晋书·志·第十四章》
每县通常每百户设置里吏一名；如果是地广人稀，允许根据情况设置里吏，限定不能少于五十户。
县率百户置里吏一人，其土广人稀，听随宜置里吏，限不得减五十户。
Each county usually had one lizu for every 100 households; if the area was sparsely populated, lizu could be set up according to the situation, but not less than 50 households.