Aerial photo taken on Dec. 30, 2019 shows a mega bridge of the Pingtang-Luodian Expressway in southwest China's Guizhou Province. Both the Ziyun-Wangmo and Pingtang-Luodian expressways in Guizhou Province opened to traffic on Tuesday, reducing travel time between Ziyun and Wangmo to 50 minutes and that between Pingtang and Luodian to an hour. The two expressways are expected to help boost tourism and improve the lives of local residents. (Xinhua/Tao Liang)