Lilingyan

Lilingyan ({zh|s=戾陵堰|p=lìlíngyàn}) was an ancient irrigation system built in 250 AD during the Three Kingdoms Period to irrigate the Beijing Plain around Jicheng (modern-day Beijing). The irrigation system consisted of Lilingyan, a dam across the Shishui (Yongding River) at the foot of Liangshan (Shijingshan), and the Chexiangqu, a divers...
Found on http://en.wikipedia.org/wiki/Lilingyan
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