Yīyáng

Yiyang is a historic name in the hill country south of Luoyang, associated with the Yi River and the lands of Songzhou. The earlier Yiyang County was raised to a prefecture during the Song–Jin wars, and under the Jin the prefecture became known as Songzhou. In 1476 the Ming established a new Yiyang County from parts of Song County and neighbouring districts. Its gazetteer links the creation of the county to the settlement and registration of displaced households in the surrounding region.