《宋史·本纪·卷二十五》
十一日，命令江、浙、淮南引塘栋水、开挖沟恤，阻止金兵南侵。
戊午，命江、浙、淮南引塘泺、开畎浍，以阻金兵。
On the eleventh, the emperor ordered soldiers in the Jiang, Zhejiang, and Huainan regions to build canals and ditches in order to prevent the Jurchen from invading.
<s>[INST] Kindly elucidate the central themes in this passage in English: 戊午，命江、浙、淮南引塘泺、开畎浍，以阻金兵。 [/INST] On the eleventh, the emperor ordered soldiers in the Jiang, Zhejiang, and Huainan regions to build canals and ditches in order to prevent the Jurchen from invading.</s>
Kindly elucidate the central themes in this passage in English: 戊午，命江、浙、淮南引塘泺、开畎浍，以阻金兵。
user
On the eleventh, the emperor ordered soldiers in the Jiang, Zhejiang, and Huainan regions to build canals and ditches in order to prevent the Jurchen from invading.
assistant