History of Jin
Japanese researchers such as (University of Tokyo) and (University of Tokyo) have pointed out that “Goguryeo ()” was denoted as “高麗” in Chinese historiographies after the Sui and Tang dynasties, and viewing the official history, “高句麗” is used up to "Book of Han"・"Book of Wei"・"Book of Song"・"Book of Liang", and "Book of Zhou"・"Book of Sui"・"Old Book of Tang" uses the term “高句麗” instead; the entry about “Goguryeo ()” in "New Book of Tang" is contained in "VOL 145高麗伝", and "高麗記" was the origin of the "New Book of Tang"高麗伝, and ’s son Go ja (), who was an aristocrat of Goguryeo who surrendered to Tang wrote 高麗圀 on his grave, and there are infinite occasions where “Goguryeo ()” was instead written “高麗” in Japan, and 「高麗遣上部大相可婁等進調」 is written in "Nihon Shoki天智紀10年正月丁末條", and Dae Muye’s message to Japan when he visited Japan in 728 said 「復高麗之舊居、有扶餘之遺俗」, and the messenger sent by Dae Heum-mu who visited Japan in 732 wrote 「高麗国王大欽茂」, and every “Goguryeo ()” was written “高麗” instead, and 「黒水靺鞨居粛慎地、東瀕海、南接高麗、亦附干高麗、嘗以兵十五萬衆助高麗拒唐」 is written in the beginning of the "History of Jin "century, but in this case "History of Jin" century can be assumed that it is the same as “高句麗”, not theoryeo is written as “高句麗”, so ”高麗” in the Hanpu's foundation story included in the same "History of Jin" century can be assumed that it is the same as “Goguryeo ()”, not the “Goryeo ()” established by Wang Geon in the 10th century, and Hanpu's foundation story states that Wanyan is a descendant of Goguryeo, and that it copied its admiration of Goguryeo in its story of foundation, where Uncivilized Jurchen () lead by Wanyan is the true descendant of Goguryeo, and since Goguryeo was a great country that thrived in Manchuria and Korea from b.c to the 7th century for about 700 years, every people and dynasty in Manchuria after the collapse of Goguryeo all admired Goguryeo, and Balhae professed Goguryeo’s revival, and as King of Jeongan Oh Hyeon-myeong ()) wrote 「臣本以高麗舊壌、渤海遣黎、保據遇」to Sung through jusen’s messenger in 981, it defined Jeongan as 「高麗舊壌」 and its people as 「渤海遣黎」, and from the fact that "History of Jin 胡十門伝" states 「吾遠祖兄弟三人、同出高麗、今大聖皇帝之祖入女直、吾祖留高麗、自高麗歸於遼、吾與皇帝皆三祖之後。」, Hesuguan Jurchens ()’s tribe believed in its history of coming to Goguryeo, and in the end of "History of Jin"胡十門伝, there is the phrase 「有合住者、亦称始祖兄苗裔、但不知興胡十門相去幾従耳。」, so Hesuguan Jurchens ()’stribe’s 合住家 also admired Goguryeo, and chief 勗 wrote 「自先君興高麗通、聞我将大、因謂本自同出、稍稍款附」 in his national book in 1131, and tribes with jusen before the establishment of Jin understanding Wanyan’s Goguryeo history claimed that they had the same ancestor, and of course these claims are extracted from Goguryeo’s sovereignty and the orthodoxy of its roots, and it aimed to succeed Goguryeo and gain political supremacy amongst other countries, and succession of Goguryeo cannot be considered as a race succession, but this proves that Balhae, Later Balhae and Jin’s royal family’s ancestor jusen also had a Goguryeo admiring doctrine, and (University of Tokyo) stated that “Manchurian’s creating such a strong nation within such a short time and preserving it for a long time must be a glorious history for Manchurians. This made Goguryeo to be remembered by Manchurians and has become an ancestor for all Manchurian dynasties.” “Even if this was some fiction, it is not fantasy or artificial, and must be considered as a historical concept. This contains a huge meaning. We can seek Manchurian character and its beliefs from this story. This can predict how Goguryeo had attracted and become powerful for Manchurians”, and just like Balhae, Jeongan, and Jin’s ancestor jusen extracted its sovereignty and origin from Goguryeo, Hanpu's foundation story was created as a political strategy to deal with the international situation surrounding the Jin royal family, and by connecting Jin and Goguryeo, the validity of occupying Goguryeo’s territory and historical evidence, and since Goguryeo was a famous Asian family, gaining supremacy and excellence of sovereignty by making the Jin family a god-like, the Jin family and Goguryeo was connected as an ideology to urge Jusen’s tribal union in Manchuria, and Wanyan praised Goryeo 「父母之邦 (parent country)」「祖宗出自大邦 (Ancestor’s land)」 because Goryeo and Goguryeo had the same name, had the same territory, and was established to copy Goguryeo, so Uncivilized Jurchen (), who had an admiration towards Goguryeo said this since it regarded Goryeo as a true Goguryeo, and called themselves 「兄大女真金国皇帝」 in a diplomatic document sent by Emperor Taizu of Jin to Goryeo in March 1117, calling the king of Goguryeo ‘brother’ meant that Jin’s power was already over the glory of Goguryeo and did not require any more mental support.