Jiuzhaigou Valley in Sichuan province. Jiuzhaigou Valley, Chengdu, Dujiangyan, Huanglong in Sichuan province are among top smog-escape destinations. (Photo/China Daily)
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Jiuzhaigou Valley in Sichuan province. Jiuzhaigou Valley, Chengdu, Dujiangyan, Huanglong in Sichuan province are among top smog-escape destinations. (Photo/China Daily)