黑龙江中游左岸帽子山古城是重要的人类遗址,自19世纪末到21世纪初,多次进行考古发掘。古城建有系统的防御体系,城墙的建筑方法为黏土掺杂腐殖土和草皮堆砌。建筑物内有典型的火坑。古城至7世纪一直持续到12世纪。 The ancient capital of the left bank of the middle reaches of the Heilongjiang Mountains is an important human site, from the late 19th century to the beginning of the 21st century, many archaeological excavations. The ancient city built a systematic defense system, wall construction methods for the clay-doped humus and turf piled. The building has a typical fire pit. The ancient city until the seventh century until the 12th century.