汴渠

东汉初年，官府已注意水利的兴修。明帝时，命民间水利专家王景和将作谒者王吴主持修治黄河和汴渠，并为这项工程而征调数十万人。

In the earlier years of the Eastern Han , the government had attached importance to constructing water conservancy , in the reign of Emperor Ming , the noted specialist Wang Jing and Wang Wu organized the huge project to repair and harness the Yellow River and the Bianqu canal , in which hundreds of thousands of people were recruited .