1 "Water the beach deep and build the weir low" is a famous saying in Dujiangyan's water control.

2 "Guide the river to accumulate stones, as far as Longmen, south to Huayin, east to Dizhu, and east to Mengjin. East to Luorui, as to Daqian, north to precipitation, as to the mainland, and north It spreads into nine rivers and flows into the sea.

”——[Xia Yu]