Representatives of citizens form a pattern reading "1968-2018" on the renovated Nanjing Yangtze River Bridge in Nanjing, east China's Jiangsu Province, Dec. 24, 2018. Built half a century ago, the Nanjing Yangtze River Bridge is China's first double-decked road-rail truss bridge. It will reopen to road traffic by the end of December after a 27-month renovation. (Photos: Xinhua)

Representatives of citizens form a pattern reading "1968-2018" on the renovated Nanjing Yangtze River Bridge in Nanjing, east China's Jiangsu Province, Dec. 24, 2018. Built half a century ago, the Nanjing Yangtze River Bridge is China's first double-decked road-rail truss bridge. It will reopen to road traffic by the end of December after a 27-month renovation.

Representatives of citizens form a pattern reading "1968-2018" on the renovated Nanjing Yangtze River Bridge in Nanjing, east China's Jiangsu Province, Dec. 24, 2018. Built half a century ago, the Nanjing Yangtze River Bridge is China's first double-decked road-rail truss bridge. It will reopen to road traffic by the end of December after a 27-month renovation.

Representatives of citizens form a pattern reading "1968-2018" on the renovated Nanjing Yangtze River Bridge in Nanjing, east China's Jiangsu Province, Dec. 24, 2018. Built half a century ago, the Nanjing Yangtze River Bridge is China's first double-decked road-rail truss bridge. It will reopen to road traffic by the end of December after a 27-month renovation.