Over the past few years, about 60 workers in several Hong Kong-invested jewellery factories in Huizhou and Shenzhen have been found to be in the late stages of pneumoconiosis...known as "lung dust disease" in China...It is incurable. Two of the workers have died and the others have been unable to work...[refers to Lucky Gem & Jewellery (part of Lucky International), Ko Ngar Gems Factory, Perfect Gem & Pearl Manufacturing, Lian Industrial]