Introduction to Erhai Lake: In ancient times, Erhai Lake was called Kunming Pool, Erhe River, Ye Yuze, etc. Because it looks like a human ear, it is named Erhai Lake. It is 42 kilometers long from north to south and covers an area of ​​more than 250 square kilometers; the average water depth is 10.5 meters, the deepest is 21.5 meters, and the water storage capacity is 2.88 billion cubic meters. Both area and water storage capacity rank second among Yunnan lakes and seventh among freshwater lakes in the country.