《元史·列传·卷五十一》
其中之一是：大都运粮河道，不用一亩泉旧道，而可别引北山白浮泉水，先向西而后折向南，经瓮山泊，自西水门入城，汇于积水潭，再向东折而南，出南水门，合入旧运粮河。
其一，大都运粮河，不用一亩泉旧原，别引北山白浮泉水，西折而南，经瓮山泊，自西水门入城，环汇于积水潭，复东折而南，出南水门，合入旧运粮河。
One of which was: not using the old Yimuquan channel for the Grand Canal in Dadu, but diverting the water from Baifu Spring in the northern mountains, flowing west first, then turning south, passing through Wengshanbo, entering the city through the Xishui Gate, converging with Jishuitan, turning east again to the south, exiting through the Nanshui Gate, and merging with the old Grand Canal.
<s>[INST] Kindly elucidate the central themes in this passage in English: 其一，大都运粮河，不用一亩泉旧原，别引北山白浮泉水，西折而南，经瓮山泊，自西水门入城，环汇于积水潭，复东折而南，出南水门，合入旧运粮河。 [/INST] One of which was: not using the old Yimuquan channel for the Grand Canal in Dadu, but diverting the water from Baifu Spring in the northern mountains, flowing west first, then turning south, passing through Wengshanbo, entering the city through the Xishui Gate, converging with Jishuitan, turning east again to the south, exiting through the Nanshui Gate, and merging with the old Grand Canal.</s>
Kindly elucidate the central themes in this passage in English: 其一，大都运粮河，不用一亩泉旧原，别引北山白浮泉水，西折而南，经瓮山泊，自西水门入城，环汇于积水潭，复东折而南，出南水门，合入旧运粮河。
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One of which was: not using the old Yimuquan channel for the Grand Canal in Dadu, but diverting the water from Baifu Spring in the northern mountains, flowing west first, then turning south, passing through Wengshanbo, entering the city through the Xishui Gate, converging with Jishuitan, turning east again to the south, exiting through the Nanshui Gate, and merging with the old Grand Canal.
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