Accompanying mineral resources run out, these cities have run into trouble in economy, society and environment.

伴随着矿产资源的逐步枯竭，这些城市在经济、社会及环境等方面相继陷入困境。

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Yixing Xinwei processes and refines rare-earth mineral compounds, which are used in a variety of products from semiconductors to fluorescent lights (see accompanying box).

CNN: China's Rarest Man