The world's highest saline lake, Nam Co, is composing a win-win answer sheet for ecological protection and livelihood improvement. Through measures such as building a "waste-free scenic area," controlling grassland desertification, and replacing fuel-powered sightseeing vehicles with electric ones, this sacred lake is blue once again. Scientific monitoring protects the ecological environment, and local people have made a good living by turning to the tourism industry. The lake is now clear, pastures are lush and wildlife has returned. The "Pearl of the Plateau" is writing a new chapter of harmony between human beings and nature.