Singapore is indeed making the best use of man-made resources by building dams to separate freshwater Singapore rivers from seawater. It can ensure that the river water enters the sea in the peak season and prevent the sea water from backfilling. Singapore itself is a water-scarce country. It imports water from Malaysia. Now it is working on desalination, rainwater collection and sewage treatment technologies. In fact, it has been able to drink, but it needs a gradual process of acceptance. It's really admirable.