Erhai Lake was formed at the end of the Ice Age and has a history of about ten thousand years. It is a captivating travel destination and the "Mother Lake" for the ethnic groups of Dali, which they rely on for survival and development. In recent years, through the persistent and tireless efforts of the guardians of Erhai Lake, the water quality has significantly improved. They demonstrate the harmonious coexistence and mutual prosperity between humanity and nature through their concrete actions.