The Reversing Falls on the St. John’s River. When the seawater of the Bay of Fundy rises above the level of the river, the water flows back into the St. John’s River. At that time, we were catching the low tide of Shanghai water, and the river water was higher than the sea level, and the river water flowed into the sea. A reef nearly 11 meters below the surface of the water will make the water in the river roll against the current into a series of rapids and whirlpools. Opposite the viewing platform is a pulp and paper mill that is in production. The chimney emits heavy smoke and can see the rare pollution emissions in Canada.