《晋书·志·第五章》
惠帝元康十年，又置平昌郡。
惠帝元康十年，又置平昌郡。
In the tenth year of Yuan Kang of Emperor Hui of the Jin Dynasty, Pingchang County was established.
<s>[INST] Kindly elucidate the central themes in this passage in English: 惠帝元康十年，又置平昌郡。 [/INST] In the tenth year of Yuan Kang of Emperor Hui of the Jin Dynasty, Pingchang County was established.</s>
Kindly elucidate the central themes in this passage in English: 惠帝元康十年，又置平昌郡。
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In the tenth year of Yuan Kang of Emperor Hui of the Jin Dynasty, Pingchang County was established.
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