(ZhejiangPictorial) CHINA-ZHEJIANG-AIR QUALITY-IMPROVEMENT (CN)

(240907) -- HANGZHOU, Sept. 7, 2024 (Xinhua) -- A drone photo shows boats sailing in the Shenjiamen fishing port in Zhoushan City, east China's Zhejiang Province, Sept. 7, 2024. In recent years, the air quality in Zhejiang province has witnessed a steady improvement. According to statistics, the PM2.5 density, a key indicator of air pollution, in