From the middle to the end of the 10th century, the government official contract system developed in the national political arena as well as in regional politics: specific family lines were given contracts to have authority and duties associated with certain government posts.
10世紀中葉から後期にかけて、ある官職に伴う権限義務を特定の家系へ請け負わせる官司請負制が中央政界でも地方政治でも著しく進展していった。