渤海国是我国唐代东北少数民族粟末靺鞨人于公元六九八年建立的封建地方政权,历时二百二十九年,于公元九二六年被辽太祖耶律阿保机所减,改渤海为东丹国,封他的长子耶律倍皇太子属东丹王。三年后,东丹王下令将渤海都城烧成灰烬。坐上木筏子,顺着镜泊飞瀑奔泻而下的牡丹江水回萦四十里,就到了渤海古都上京龙泉府遗墟,今黑龙江省宁安县东京城附近。 The Bohai State is a feudal local power established by the Northeast Minority in the Tang Dynasty in the northern part of the Tang Dynasty. It was established in688 and lasted for two hundred and twenty-nine years. The Bohai Sea is the country of Dongdan, sealing his eldest son, Prince Elvish Crown Prince, of the Eastern Kingdoms. Three years later, the Eastern Dan King ordered the city of Bohai into an ashes. Sitting on the raft son, down the mirror Mau waterfalls down the Mudanjiang back to Yingying forty, went to the capital of Bohai Sea Longquan Fu on the ruins of the city, now Ning’an County, Heilongjiang Province near Tokyo.