A railway staff worker is seen at a control center in Rongjiang railway station, southwest China's Guizhou Province, Dec. 26, 2014. Railway construction in Guizhou witnessed a rapid development during China's 12th Five-Year Plan period. The province's railway mileage has expanded to over 3,000 kilometers till 2015, including 700 kilometers of high-speed railway. [Photo: Xinhua/Ou Dongqu]