Introduction to Swan Sea: Swan Sea, 2905 meters above sea level, lies quietly on its back in the valley. There are dense cedar forests on the lakeshore and green grass on the lake surface. A clear stream meanders through, nourishing the water and soil. Most of the lake surface has been silted into shoals and has become a semi-swamp lake, connected to the lower reaches of Fangcao Sea. The shoal is dotted with flowers and is ethereal and quiet, making it the highest point of Jiuzhaigou Rize Scenic Area.