The location of Hunan's southwestern Hunan, the local economy is not active, the people either go out to work or go up the mountain to mine. Due to the constant mining disasters, despite the government's efforts to rectify and regulate, many people still illegally mine. Miners often do not pay attention to the protection of mines. Many years later, many miners have pneumoconiosis. The film started shooting in 2010 until 2018, with a filming period of nearly ten years, until the death of Zhao Pingfeng, the protagonist of pneumoconiosis, leaving young children and mentally handicapped wife.

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