《明史·志·卷六十三》
现在，想除去这二种灾难，祇有从胶州以北，杨家圈以南，疏通陆地一百里，没有高山长坡的阻隔，杨家圈北边全部通海潮。
今欲去此二患，惟自胶州以北，杨家圈以南，浚地百里，无高山长坂之隔，杨家圈北悉通海潮矣。
Now, to remove these two disasters, we only have to clear out a hundred li of land from the north of Jiazhou to the south of Yangjiaquan, where there are no obstacles from towering mountains or steep slopes; there is tidal bore along the entire area to the north of Yangjiaquan.