Proper treatment gives patient new life

Four years after undergoing a transplant to replace his lungs, which were destroyed by pneumoconiosis, Zhang Haichao now lives a healthy and normal life.

"I feel fine. My lung functions are back to normal," he said. "Before the surgery, I could barely walk 50 meters, but now I can even climb mountains."

Zhang, 37, began displaying symptoms of pneumoconiosis, such as harsh coughing, in 2007 while working at a dusty workshop producing fireproof materials in Xinmi, Henan province.