Underground workers are solitary, and their work environment is complex and perilous.,If Lao Liao acted impatiently and chose to walk away instead of waiting for the tram, it meant that something urgent had happened and the two people needed to find a chance to meet immediately.,"Team leader, I'm going downstairs to buy some cigarettes," Ding Naifei said. He had several cigarette butts at his feet and was out of smokes; his nicotine cravings were kicking in.。