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Fog and Haze Enveloped China
**中国 的 雾 霾 天气**
China's smoggy weather
10月 21日 清晨 ，哈尔滨 出现 重度 雾 霾 天气 ，一些 市区 能见度 不足 50米 ，全市 中小学 停课 ，部分 公交线路 暂时 停止 运营 ，多条 高速公路 全线 封闭。
In the early morning of October 21, severe smog occurred in Harbin. Visibility in some urban areas was less than 50 meters. Classes in primary and secondary schools in the city were suspended. Operations of some bus lines were temporarily suspended, and many expressways were closed.