C572 Chang'an Emissary

Longxi County, which was located in the westernmost part of the Yongzhou region, was the source of the Yellow River. Liangzhou was located in the westernmost part of the Yongzhou region, which was located in Longxi County, which was the source of the Yellow River. However, the three prefectures were now owned by Luoyang, so the location of Longxi was not that important