China is celebrating the 10th anniversary of the full operation of its massive water diversion project – the first phase of the eastern and central routes of the South-to-North Water Diversion Project. Stretching over 2,000 kilometers, the two routes have transferred water from the Yangtze River to the country's arid north, benefiting over 185 million people. How has the project optimized China's water resource allocation, and how can it ensure ecological protection?