CHONGQING, May 2 (Xinhua) -- Roaming about the city might be a pleasant hobby for some, yet for one group of people in southwest China's Chongqing Municipality, it is a serious business.
Wang Daohuai, a 35-year-old staffer at Chongqing Rail Transit Co., Ltd., described himself as a "city walker." He needs to walk over 10 km every day along the rails in order to ensure the safe operation of urban rail transit.
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