《水经注·卷二十一》
酮阳县有葛陵城，建武十五年，把这地方改封给安成侯姚丹，立为侯国。
县有葛陵城，建武十五年，更封安城侯铫丹为侯国。
Ketongyang County has Geling City. In the fifteenth year of Jianwu, this place was renamed and granted to Yao Dan, the Marquis of Anchong, and was established as a fiefdom.
<s>[INST] Explain the meaning of this Classical Chinese passage in English: 县有葛陵城，建武十五年，更封安城侯铫丹为侯国。 [/INST] Ketongyang County has Geling City. In the fifteenth year of Jianwu, this place was renamed and granted to Yao Dan, the Marquis of Anchong, and was established as a fiefdom.</s>
Explain the meaning of this Classical Chinese passage in English: 县有葛陵城，建武十五年，更封安城侯铫丹为侯国。
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Ketongyang County has Geling City. In the fifteenth year of Jianwu, this place was renamed and granted to Yao Dan, the Marquis of Anchong, and was established as a fiefdom.
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