Liu Junli is a boiler operator at a factory in the Tianjin Economic Development Zone. Before, the job was so dirty that he needed to change clothes at least twice a day. Now, as the result of a green overhaul at the factory, his working environment has been transformed. Sitting in a clean, bright workroom, he controls the boiler by way of a smart console. The "black-collar worker" has turned into a "white-collar worker," and what was once a hard, dirty job has become sought-after.