In this aerial photo taken on June 30, 2018, workers join together the two segments of the Daxiaojing Bridge in Luodian County, southwest China's Guizhou Province. A key project along the Pingtang-Luodian expressway, the Daxiaojing Bridge is a deck arch bridge across the Dajing River in Luodian County, Guizhou Province with an arch span of 450 meters and a total length of 1.5 kilometers. (Xinhua/Liu Chaofu)