三有司掌握着城邑人口、农牧生产、军备、军法、建筑等政治军事生活的重要方面，无疑是国家政治生活的核心。
The officers of San You Si hold the corn of the dynasty , such as cities population , agriculture and animal husbandry production , arms military law , construction and other important aspects of the political and military life .
三有司