《明史·志·卷六十》
皇帝完全依从他们的请求，于是选择在清口上游的北岸，开通腰铺支河达于草湾。
帝悉从其请。乃议於清口上流北岸，开腰铺支河达於草湾。
The emperor complied with their request entirely, so he chose to open up the Yaopu tributary to reach Caowan at the northern bank on the upper reaches of the Qingkou.