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**Air Quality Crisis: Haze Spreads Across East China, Triggering Emergency Measures**
In recent days, a thick layer of smog has enveloped parts of Jiangsu, Zhejiang, and Shanghai, prompting widespread use of face masks. The situation has escalated to the point where 25 provinces across China are now experiencing varying degrees of air pollution. Among them, the Yangtze River Delta region is facing the most severe smog conditions.
In **Jiangsu**, the city of Nanjing recorded an Air Quality Index (AQI) of 338, classified as heavily polluted, with PM2.5 as the primary pollutant. By 5 p.m. yesterday, 10 out of 13 cities in the province were under heavy pollution, with Taizhou being the worst-affected, reaching an AQI of 420. The smog was so dense that some citizens in Nanjing's Gulou District reported seeing two suns in the sky—an unusual optical phenomenon caused by light refraction through airborne particles. Experts explained that this "magic day" effect occurs when sunlight passes through tiny floating particles in the atmosphere, creating a double image.
By 6 p.m. yesterday, Nanjing’s AQI had exceeded 300 for over 40 hours, triggering a red alert. As a result, kindergartens and schools remained closed, and emergency measures were enforced. Lianyungang, Taizhou, and Huai’an also faced more severe pollution than Nanjing, but only Nanjing issued a red warning due to its earlier implementation of local standards. According to the provincial environmental authority, the national guidelines were only introduced in April, while Jiangsu had already set its own early warning system in February.
The Provincial Environmental Protection Agency is currently working on revising Nanjing’s emergency plan to raise the threshold for a red alert to an AQI of 500. This would include stricter vehicle restrictions and flexible work schedules for businesses. Officials believe these measures could help reduce traffic emissions and limit industrial activity, providing a temporary buffer against pollution.
In **Zhejiang**, Hangzhou took swift action after PM2.5 levels in Xiasha reached 536 micrograms per cubic meter. The city implemented its emergency response plan, which includes halting 1/2 of official vehicles during the second-level alert and 2/3 during the first-level alert. This measure aims to reduce vehicle emissions and improve air quality.
Meanwhile, **Anhui**’s Hefei faced criticism after it was reported as the “worst air city†among 74 Chinese cities. However, the Hefei Environmental Protection Bureau denied the accuracy of the data, stating that it came from a mobile app and was not scientifically reliable. Despite this, real-time monitoring showed severe pollution across all 10 stations, with PM2.5 levels exceeding 500 in some areas. Officials warned that such extreme levels are rare and highlight the urgent need for stronger pollution control measures.
As the smog continues to affect millions, the call for stricter regulations and coordinated efforts between local and national authorities grows louder. With health risks rising and daily life disrupted, the situation underscores the importance of long-term solutions to combat air pollution.