🇨🇳 China · Hydraulic works
Lingqu Canal North Section — Xing'an Qincheng Cut and Pound Lock
Qin (Warring States unification) · Qin Central, Bashu, Baiyue
Xing'an Xiang north 70% vs Lingqu south 30% divide with Huazui spillway and 36 pound locks, 219 BCE Shi Lu Qin.