The Wudalianchi Scenic Area in Heilongjiang was formed by volcanic eruptions three hundred years ago. When you board the active volcano Black Dragon Mountain in the dormant period, you can see the huge crater at close range, and the funnel-shaped inner wall is not born. After aerial photography, the hillside can clearly see the hot lava flowing through the place. Although most of the hillsides are covered with dense vegetation, there are still some areas with bare volcanic rocks, which is very shocking!