Mu Tong was a village in the kingdom of Koryo in Kara-Tur. It lay near the headwaters of the Malu River, high in the Sillan Mountains. Jade was discovered near Mu Tong in 1357 DR. Folk believed that these finds were evidence of a massive hoard of jade said to be hidden somewhere in the mountains by the ancient Han people, ancestors of the Koryoans, when they'd fled invasion by the forces of Shou Lung.