In 1988, Huang Zhonglu got a job as a welder for Chang'an Auto, the Chinese carmaker that had employed his father and grandfather.

To prevent being burned by flying sparks, welders must wear thick clothes that cover the arms and ankles, even in the hottest weather. Collars and cuffs must be tightly closed, and goggles, protective masks and airtight headgear must be worn.

"Despite the protective measures, I still got several burn scars on my legs and arms from welding," Huang said.

(Source: China Daily)