金史
The "History of Jin" says that: "the Jin progenitor originated from the Mohe." "The Heishui Mohe resided in the old Sushen area ... the Jin state rose up there." "When the Tang dynasty began the Sumo, Heishui, both tribes, were ruled by Goguryeo." "Jin people originate out of tribes attached to Goguryeo." The "Ancestral Records" (祖宗实录) state these as well."The Sumo Mohe were then attached to Goguryeo and their last name was Da." Jin's progenitor, originated from the Mohe. Mohe originally were called Wuji. Wuji, on the old Sushen land.