Yuncheng Salt Lake is one of the three largest inland salt lakes of sodium sulfate type in the world. Because its salt content is similar to the "Dead Sea" in the Middle East, people can float but not sink in the water, so it is called the "Sea of Death". 1 2 3 Yuncheng Salt Lake is an ancient and typical inland saltwater lake. Geological research shows that Yuncheng Salt Lake was born in the Cenozoic Tertiary Himalayan tectonic movement, about 50 million years ago, extending from northeast to southwest, with a length of about 30 kilometers, a width of 3 kilometers to 5 kilometers, an altitude of 324.5 meters, a deepest point of about 6 meters, and a total area of 132 square kilometers.