Baikal, located in southern eastern Siberia, China was called the 'North Sea' in ancient times. It has been the main activity area of the ancient northern ethnic groups in our country. The famous legend of Su Wu was also pastured here. Beagle Lake is a long and curved lake, with a length of 636 kilometers and an average width of 48 kilometers, with a maximum width of 79.4 kilometers. It looks like a crescent moon embedded in the lush green mountains and ridges of eastern Siberia. The area of Baikal Lake is about 31,500 square kilometers, ranking eighth in the world. It is the deepest and largest freshwater lake in the world. Scientists have made assumptions: If no other rivers flow into Beagle Lake, it would take 40 years to drain the water from Baegal Lake if the current average annual flow of Angara River flows out. If all major rivers in the world flowed into Beagle Lake, it would take about a year to fill it up. The lake's water can supply drinking water for half a century. At the mouth of the river stands a large round stone, with a rolling wave-like giant rock, majestic and grand, is a unique scenic spot in the lake area.