Zhongxin Finance, May 18. According to the official account of the Ministry of Ecology and Environment on the 18th, in April, the average number of days with good air quality in 339 cities at the prefecture level and above across the country was 89.0%, down 3.5 percentage points year-on-year.

From January to April, the average number of days with good air quality in 339 cities at the prefecture level and above was 85.1%, an increase of 1.3 percentage points year-on-year.

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  In the ranking of key cities, among the 168 key cities in April, 20 cities including Haikou, Lhasa and Zhoushan had relatively good air quality; 20 cities including Hebi, Baoding and Xinxiang had relatively poor air quality.

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  From January to April, among the 168 key cities, 20 cities including Lhasa, Haikou and Zhoushan had relatively good air quality; 20 cities including Xianyang, Urumqi and Xi'an had relatively poor air quality.

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