There are an estimated 440,000 sufferers of the debilitating pneumoconiosis lung disease but most can't afford treatment
Tian Yongsheng from Shanxi province is desperate to find a way to relieve the chest pain which has haunted him for years.
The 37-year-old former coal miner has been diagnosed with pneumoconiosis, caused by the chronic inhalation of dust deposited in his lungs.
He is well aware what will happen if he is not treated. Many of his neighbours in Dai county - all coal miners - have died of the disease after suffering great pain.
'In the five villages [in Dai county] that I knew, all men from 18 to 50 suffer pneumoconiosis,' said Mr Tian. 'Among 100 coal miners, 100 have pneumoconiosis.
'We knew nothing about the disease before and we could hardly afford the medicine because coal miners were paid very little. So many have died and the villages are left with widows and orphans.'