Jin was created from Tang Prefecture (唐州, Tángzhōu) in AD 528 under the Northern Wei dynasty.
Under the Sui, it was renamed Linfen Commandery (臨汾郡, Línfénjùn).
Under the Tang, it was renamed Pingyang Commandery (平陽郡, Píngyángjùn).
[1] Jin Commandery in the Tang dynasty lay around modern Linfen and Hongtong in Shaanxi.
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