《水经注·卷十八》
水往东南流，向东经杜阳县老城，人们称为故县川。
其水东南流，东径杜阳县故城，世谓之故县川。
The water flows to the southeast, passing through the old city of Duyang County to the east, which people call Guxian River.
<s>[INST] First, translate the Classical Chinese text into modern Chinese and then into English. Classical Chinese: 其水东南流，东径杜阳县故城，世谓之故县川。 [/INST] 水往东南流，向东经杜阳县老城，人们称为故县川。 Then, The water flows to the southeast, passing through the old city of Duyang County to the east, which people call Guxian River.</s>
First, translate the Classical Chinese text into modern Chinese and then into English. Classical Chinese: 其水东南流，东径杜阳县故城，世谓之故县川。
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水往东南流，向东经杜阳县老城，人们称为故县川。 Then, The water flows to the southeast, passing through the old city of Duyang County to the east, which people call Guxian River.
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