Gujiao, Shanxi, China -- The coal mine in Gujiao. The mingongs, worker-farmers coming from the poor regions of China, go down the mine for 150 Euros per month. Not enought to build a real house around the "hole." Without any social protection, without security inside the mine, they are the most exposed to risk. The pollution of the factories is also a breathing disease factor. Xiu Yu Jun says, "before we were respected as miners; now we are the last on the social rank."