黑龙江地区三江平原上的友谊县凤林古城及隔河相望的宝清县炮台山古城，这两处大遗址是２０世纪７０年代末发现的，对其考古发掘则是近年逐步开展的，特别是炮台山上“七星祭坛”天文考古现象则是２０００年６月２０日刚被发现的，对它们的综合研究和破译还处于初始阶段。 凤林 The ancient city of Fenglin in Youyi County on the Sanjiang Plain in Heilongjiang Province and the ancient city of Fortress in Baoqing County, which are located across the river. The two major sites were discovered in the late 1970s and their archaeological excavations have been gradually carried out in recent years. It is the astronomical and archeological phenomenon of the “altar of the seven stars” in the Fortress Hill that was just discovered on June 20, 2000 and the comprehensive study and deciphering of them are still in its infancy. Fenglin