The Dongjiang river supplies 70% to 80% of the city’s water.
"Water plays a very important role in Hong Kong's future," says Liu, adding that as long as the city is dependent on outside sources, those outside sources can use the water to "keep us in check." She adds, "Water has been very political; it's not just a commodity."
The lesson she thinks Hong Kong can teach the world? "Water is justice. It is self-reliance. It is sustainability. All of those values are much more important than whether you can pay for 10 or 20 liters. A commodity comes at a price. Whoever can bid for the higher price can just take it and control it."