黑龙江省考古研究所自1989年5月至1991年10月,对渤海上京城的官衙遗址进行了3次发掘,揭开面积约为2000平方米。官衙址位于上京内城区(宫城以南),现已发现围墙、础石、房址、灰坑以及车辙等遗迹,出土文物以建筑饰件居多,其次为生活用具,另外还有坩埚、砚、文字砖、铜牌饰、三彩片及开元通宝 Heilongjiang Institute of Archeology from May 1989 to October 1991, on the Bohai Sea on the site of the official site of Ya evolved three excavations, opened an area of ​​about 2000 square meters. The official site is located in the inner city of Beijing (Miyagi south), has been found in the walls, stone, house sites, pits and ruts and other relics, the majority of architectural ornaments unearthed artifacts, followed by life appliances, as well as crucibles, Yan , Text bricks, bronze ornaments, three color film and Kaiyuan Tongbao