Mumatan is located southeast of Tianshui City and Dangchuanyanzi Pass. It is the only way to go to the mountains at the rear of the Maiji Mountain Scenic Area. According to legend, when King Xiao of the State of Zhou was only thirteen years of age, he performed many meritorious deeds here, which allowed him to become a vassal of the State of Qin. The State of Qin was the official name of the country and later became known as the Qin Dynasty. This is the place from which the Qin Dynasty began. The Han Dynasty tombs which were unearthed here in 1985 had various relics of the Qin Dynasty including silk maps.