蒗

* 〔～荡渠〕古运河，故道自今中国河南省荥阳县北引黄河水东流。战国以来为中原水道交通干线。魏晋后自开封以下改称"蔡水"，以上改称"汴水"。亦称"狼汤渠"

(translated) Refers to [Langdang Canal], an ancient canal; its former course drew water from the Yellow River, eastward from present-day northern Xingyang County, Henan Province, China; served as a major waterway in the Central Plains since the Warring States period; later renamed "Cai River" (downstream from Kaifeng) and "Bian River" (upstream from Kaifeng) after the Wei and Jin Dynasties; also known as "Langtang Canal"