Langfang, about 40 kilometers from Beijing, is one of the most air-polluted cities in China. But at the local environmental protection bureau, deputy chief Li and his assistant Hu are working hard to change this.
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Langfang, about 40 kilometers from Beijing, is one of the most air-polluted cities in China. But at the local environmental protection bureau, deputy chief Li and his assistant Hu are working hard to change this.
