《晋书·志·第四章》
天子百里之内田税供给官用，千里之内供给衣食，千里之外设方伯为诸侯之长。
天子百里之内以供官，千里之内以为御，千里之外设方伯。
Within a hundred *li* of the emperor's lands the land tax is requisitioned for state use, within a thousand *li* it is requisitioned for clothes and food, and beyond a thousand *li* there are feudal lords as the head of the vassals.