There was a meeting to fix borders in 1880's ("Kamgye Conference") and as the result, the Tumen river (図們江 in Chinese) and the Yalu river became borders between Korea and China.
1880年代に国境線画定の会談（「勘界会談」）がもたれたが、その結果豆満江（図們江）・鴨緑江をもってとりあえず国境線とすることとなった。