A sanitation worker, identified as Zhou, empties a garbage can on Dameisha beach Wednesday. (Inset) Zhou always wears a smile. Zhou is responsible for clearing up to 170 garbage cans on the beach, with each can being emptied six or seven times daily. The garbage cans are placed 10 meters apart, meaning that Zhou has walked at least 9,000 meters a day to do his work for the past seven years. The 63-year-old man said his goal is not to let a single cigarette butt remain on the beach. Zhong Huadeng