《明史·志·卷六十一》
按时开关，严格其禁令。
以时启闭，严其禁。
And dredge the Yizhen and Guazhou waterways to connect the water of rivers and lakes, and open the Dashi of Lüliang and Baipu to smoothen the water flow, and open the White Pagoda River of Taizhou to reach the great river.