The Meng slaves are an ethnic group in the north of the Great Jin Dynasty, living on horseback archery, with a very fierce folk custom. Ever since they occupied the Lingbei region, they have been in constant open and covert struggles with the Great Jin for years, with continuous conflicts and disputes. However, since Nangong Yi recovered Lingbei and Cai Wei developed a glass industry there, no further conflicts erupted, the national economy developed, and the people's living standards improved, so they willingly submitted to the Great Jin.
