《晋书·志·第四章》
塞童划分出庐医塑的建堕、堕江、皇睦、窒握、渣边五县设山阳郡，属于南兖州。
安帝分广陵郡之建陵、临江、如皋、宁海、蒲涛五县置山阳郡，属南兗州。
Se Tong divided out Jian Duo, Duo Jiang, Huang Mu, Zhi Wo, and Zha Bian, the five counties of Luyi Chu, to establish Shanyang County, which belonged to Nanyan Prefecture.
<s>[INST] Kindly elucidate the central themes in this passage in English: 安帝分广陵郡之建陵、临江、如皋、宁海、蒲涛五县置山阳郡，属南兗州。 [/INST] Se Tong divided out Jian Duo, Duo Jiang, Huang Mu, Zhi Wo, and Zha Bian, the five counties of Luyi Chu, to establish Shanyang County, which belonged to Nanyan Prefecture.</s>
Kindly elucidate the central themes in this passage in English: 安帝分广陵郡之建陵、临江、如皋、宁海、蒲涛五县置山阳郡，属南兗州。
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Se Tong divided out Jian Duo, Duo Jiang, Huang Mu, Zhi Wo, and Zha Bian, the five counties of Luyi Chu, to establish Shanyang County, which belonged to Nanyan Prefecture.
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