《水经注·卷二十二》
薛攒注《汉书》说：中牟在春秋时是郑国的疆域，到三卿分晋时，则在魏的国境内；赵在潭水以北，国界不到这里。
薛瓒注《汉书》云：中牟在春秋之时，为郑之堰也。及三卿分晋，则在魏之邦土，赵自漳北，不及此也。
Xue Zuan, a commentator on the Book of Han, said: Zhongmou was part of Zheng territory during the Spring and Autumn period, and it became territory of Wei when the Three Ministers divided Jin; Zhao was north of Tan Shui and its borders did not reach here.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 薛瓒注《汉书》云：中牟在春秋之时，为郑之堰也。及三卿分晋，则在魏之邦土，赵自漳北，不及此也。 [/INST] Xue Zuan, a commentator on the Book of Han, said: Zhongmou was part of Zheng territory during the Spring and Autumn period, and it became territory of Wei when the Three Ministers divided Jin; Zhao was north of Tan Shui and its borders did not reach here.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 薛瓒注《汉书》云：中牟在春秋之时，为郑之堰也。及三卿分晋，则在魏之邦土，赵自漳北，不及此也。
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Xue Zuan, a commentator on the Book of Han, said: Zhongmou was part of Zheng territory during the Spring and Autumn period, and it became territory of Wei when the Three Ministers divided Jin; Zhao was north of Tan Shui and its borders did not reach here.
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