As an ancient and civilized ethnic group,the Mon-golian nationality not only made splendid militaryachievements but also noteworthy contributions ineconomy and culture to human civilization.It was anethnic group that once lived in a cold,remote andsparsely populated area and mainly survived by hunt-ing and herding.At the end of the 11th century andthe early 12th century,Mongolians began to unifythemselves and gradually conquered surrounding eth- As an ancient and civilized ethnic group, the Mon-golian nationality not only made splendid militaryachiements but also noteworthy contributions ineconomy and culture to human civilization. It was anethnic group that once lived in a cold, remote and sparsely populated area and primarily survived by hunt- ing and herding. At the end of the 11th century and the early 12th century, Mongolians began to unify the person and gradually conquered surrounding eth-