中国天更蓝，水更清

Air Quality Improvement - In the first quarter of this year, the overall air quality in China has continued to improve, with an average of 84.8% of days classified as good across 339 cities, an increase of 1.2 percentage points year-on-year [2] - The average concentration of PM2.5 decreased by 4.8% to 41.3 micrograms per cubic meter, while PM10 concentration fell by 3.0% to 65 micrograms per cubic meter [2] - Key regions such as Beijing-Tianjin-Hebei, Yangtze River Delta, and Fenwei Plain saw respective PM2.5 concentrations of 51.4, 48.2, and 50.2 micrograms per cubic meter, all showing a decline [2] Surface Water Quality Improvement - Among 3,641 national surface water monitoring sections, 91.0% were rated as good quality (Class I-III), an increase of 1.1 percentage points year-on-year, while the proportion of poor quality (Class V) sections remained at 0.7% [3] - The seven major river basins, including the Yangtze and Yellow Rivers, reported a 92.1% good quality rate, up by 0.6 percentage points [3] - In a survey of 196 key lakes and reservoirs, 82.1% were classified as good quality, with the proportion of poor quality lakes decreasing by 0.9 percentage points to 3.6% [3]