Yang Prefecture (Shaanxi)
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Yangzhou or Yang Prefecture (洋州) was a zhou (prefecture) in imperial China, centering on modern Yang County, Shaanxi, China. It existed (intermittently) from the 6th century until 1370. During the short-lived Later Shu (934–965) it was known as Yuan Prefecture (源州).
The administrative region of Yang Prefecture in the Tang dynasty is under the administration of modern Hanzhong in southwestern Shaanxi. It probably includes parts of modern: