People visit the renovated Nanjing Yangtze River Bridge in Nanjing, capital of east China's Jiangsu Province, Dec. 26, 2018. Built half a century ago, the Nanjing Yangtze River Bridge is China's first double-decked road-rail truss bridge. It was reopened on Wednesday after a renovation of over two years. (Xinhua/Fang Dongxu)

People visit the renovated Nanjing Yangtze River Bridge in Nanjing, capital of east China's Jiangsu Province, Dec. 26, 2018. Built half a century ago, the Nanjing Yangtze River Bridge is China's first double-decked road-rail truss bridge. It was reopened on Wednesday after a renovation of over two years. (Xinhua/Fang Dongxu)

People visit the renovated Nanjing Yangtze River Bridge in Nanjing, capital of east China's Jiangsu Province, Dec. 26, 2018. Built half a century ago, the Nanjing Yangtze River Bridge is China's first double-decked road-rail truss bridge. It was reopened on Wednesday after a renovation of over two years. (Xinhua/Fang Dongxu)

People visit the renovated Nanjing Yangtze River Bridge in Nanjing, capital of east China's Jiangsu Province, Dec. 26, 2018. Built half a century ago, the Nanjing Yangtze River Bridge is China's first double-decked road-rail truss bridge. It was reopened on Wednesday after a renovation of over two years. (Xinhua/Fang Dongxu)

People visit the renovated Nanjing Yangtze River Bridge in Nanjing, capital of east China's Jiangsu Province, Dec. 26, 2018. Built half a century ago, the Nanjing Yangtze River Bridge is China's first double-decked road-rail truss bridge. It was reopened on Wednesday after a renovation of over two years. (Xinhua/Fang Dongxu)