《水经注·卷九》
王莽改为河内，是旧河内郡的治所。
王莽以为河内，故河内郡治也。
Wang Mang changed it to Henan, which is where the old Henan Prefecture was located.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 王莽以为河内，故河内郡治也。 [/INST] Wang Mang changed it to Henan, which is where the old Henan Prefecture was located.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 王莽以为河内，故河内郡治也。
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Wang Mang changed it to Henan, which is where the old Henan Prefecture was located.
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