Han people The Han were an ethnicity of human s who lived in the land of Koryo in Kara - Tur in prehistoric times . They were the ancestors of the Koryoan people , and presumably also the Kozakuran and Wanese peoples , owing to a shared linguistic roots . The Han language was the basis for the Koryo , Kozakuran , Wa - an , and other languages , and continued to be used by scholars and philosophers for ages afterward . A related people were the Chinhan . History . Han history was largely unknown , pieced together from disconnected legends . The Han people once fled invasion by the forces of Shou Lung . Much later , it was told that they ' d hidden a great hoard of jade somewhere in the Sillan Mountains . Around 1357 DR , jade was discovered at the mountain village of Mu Tong , and some thought it evidence of the ancient Han trove . When the Kanko volcano rose up out of Kang Bay and erupted , it was said that the very skies over Koryo caught fire . The land was devastated ; the city of Old Bejung , closest to Kanko , was engulfed in poisonous gas that killed all the people , before the city itself was obliterated in a matter of seconds and buried in ash . According to legend , the entire Han clan sought shelter from the eruption in the vast Dang Caverns . Language . The Han spoke the Han language . Legend told that after the creation of the land of Kara - Tur , the gods themselves handed down the Han language to the Han people . It became the root tongue for the Koryo , Kozakuran , and Wa - an languages , and possibly others . By the 14th century DR , Han was studied and employed only by philosophers and sages of Kara - Tur . Magical relics . Han magicians crafted a number of legendary vessels of power , each of which would play an important role in later Koryoan history . The Wo - ha Ui - jung were ten vessels that each bestowed great and strange powers to those who used them . These became separated over the centuries and some were lost , but according to legend , the one who brought all the Wo - ha Ui - jung together once more would be the first emperor of the whole world . Another was the Hu ' i Wing , a huge brazier that granted visions of the future . Descendants . One branch or descendants of the Han were the Chinhan people . History recorded them as the last to hold the " coiled dragon " , the greatest of the Wo - ha Ui - jung , in around the 7th century before Dalereckoning . The descendants of the Han people became the Koryoan s , who founded the three kingdoms of modern Koryo . The island realms of Wa and Kozakura , lying to the south of the Koryo peninsula , were thought to have been settled by an offshoot branch of a mainland people in ancient times , though they were quite different by the 14th century DR . These people were most likely the Han , as the Han language was the root of the Wa - an and Kozakuran languages . Human civilizations did not record this migration , nor when it happened . However , the much - disregarded but far older oral tradition of the korobokuru of the islands told of humans arriving from over the sea , of korobokuru heroes fighting foreign chieftains and winning wondrous treasures . The lost civilization of the Quang Muku Forest in eastern Koryo may have had some relation to the Han . Archaeology . Folk of the village of Ra ' koo discovered and disturbed a burial site of the Han , and brought a curse upon themselves . By 1357 DR , it was impossible for anyone to sleep within the village . By that time , an entrance to the ash - covered ruins of Old Bejung had also been found . They were expected to contain much treasure .