《资治通鉴·汉纪·汉纪二十五》
堤防的修筑，历时未久，兴起于战国时代。各自为了本国利益，修筑堤防，堵塞百川。
盖堤防之作，近起战国，雍防百川，各以自利。
Embankments have not existed for very long. They originated in the Warring States period. Each state, acting in its own interests, built embankments to block off hundreds of rivers.