Photo taken on April 29, 2017 shows the construction site of a bridge across the Yellow River as a section of Yuncheng-Lingbao Expressway in Yuncheng city, North China’s Shanxi province. The expressway is built to link Yuncheng with Lingbao in Central China’s Henan province.[Photo/Xinhua]

Photo taken on April 29, 2017 shows the construction site of a bridge across the Yellow River as a section of Yuncheng-Lingbao Expressway in Yuncheng city, North China’s Shanxi province. The expressway is built to link Yuncheng with Lingbao in Central China’s Henan province.[Photo/Xinhua]

Photo taken on April 29, 2017 shows the construction site of a bridge across the Yellow River as a section of Yuncheng-Lingbao Expressway in Yuncheng city, North China’s Shanxi province. The expressway is built to link Yuncheng with Lingbao in Central China’s Henan province.[Photo/Xinhua]

Photo taken on April 29, 2017 shows the construction site of a bridge across the Yellow River as a section of Yuncheng-Lingbao Expressway in Yuncheng city, North China’s Shanxi province. The expressway is built to link Yuncheng with Lingbao in Central China’s Henan province.[Photo/Xinhua]

Photo taken on April 29, 2017 shows the construction site of a bridge across the Yellow River as a section of Yuncheng-Lingbao Expressway in Yuncheng city, North China’s Shanxi province. The expressway is built to link Yuncheng with Lingbao in Central China’s Henan province.[Photo/Xinhua]

Photo taken on April 29, 2017 shows the construction site of a bridge across the Yellow River as a section of Yuncheng-Lingbao Expressway in Yuncheng city, North China’s Shanxi province. The expressway is built to link Yuncheng with Lingbao in Central China’s Henan province.[Photo/Xinhua]