《水经注·卷十九》
横，如淳说：音光，所以叫光门。
如淳曰：横音光，故曰光门。
Heng, Ru Chun said: The sound is light, so it is called Guangmen.
<s>[INST] Translate the following Classical Chinese text into English: 如淳曰：横音光，故曰光门。 [/INST] Heng, Ru Chun said: The sound is light, so it is called Guangmen.</s>
Translate the following Classical Chinese text into English: 如淳曰：横音光，故曰光门。
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Heng, Ru Chun said: The sound is light, so it is called Guangmen.
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