Extra explanation

From Medien Wiki

Water of River

-circulation

rivers of city and citizens share the body. People in the city drink the river water. The sewage produced by human excretion goes through a purification process and returns to the river. River water becomes the water we drink again.

-Our bodies (muscles and blood) are made up of water.

-Suitability as a physical property.

1 water drop + 1 water drop = 1 water drop

Water are always become Oneness, not separated.