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A villager uses wooden poles to support the wall of his cave-house in North China's Shanxi province, which has become unsafe and likely to collapse due to cracking, July 15, 2013. Massive coal extraction has caused serious ground sinkage and collapsing in the area. Yuan Chunqing, a deputy of the National People's Congress and Party chief of Shanxi, said the province will conduct monitoring of sinkholes in coal mining areas at a cost of 24 billion yuan. The whole project is due to be finished by 2020. [Photo/Xinhua]
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