玄菟郡
In the early 3rd century, Gongsun Du, a Chinese warlord in Liaodong, supported Buyeo to counter Xianbei in the north and Goguryeo in the east. After destroying the Gongsun family, the northern Chinese state of Cao Wei sent Guanqiu Jian to attack Goguryeo. Part of the expeditionary force led by Wang Qi (), the Grand Administrator of the Xuantu Commandery, pursued the Guguryeo court eastward through Okjeo and into the lands of the Yilou. On their return journey they were welcomed as they passed through the land of Buyeo. It brought detailed information of the kingdom to China.