A drone photo shows the Machanghe grand bridge under construction along the Guiyang-Pingtang Expressway in southwest China's Guizhou Province, Aug. 21, 2024. The main arch of the Machanghe grand bridge along the Guiyang-Pingtang Expressway was successfully joined on Wednesday. The bridge has a length of 381.5 meters with an arch spanning 260 meters. (Xinhua/Yang Wenbin)

　　A drone photo shows the Machanghe grand bridge under construction along the Guiyang-Pingtang Expressway in southwest China's Guizhou Province, Aug. 21, 2024. The main arch of the Machanghe grand bridge along the Guiyang-Pingtang Expressway was successfully joined on Wednesday. The bridge has a length of 381.5 meters with an arch spanning 260 meters. (Xinhua/Yang Wenbin)

　　A drone photo shows the Machanghe grand bridge under construction along the Guiyang-Pingtang Expressway in southwest China's Guizhou Province, Aug. 20, 2024. The main arch of the Machanghe grand bridge along the Guiyang-Pingtang Expressway was successfully joined on Wednesday. The bridge has a length of 381.5 meters with an arch spanning 260 meters. (Xinhua/Yang Wenbin)

　　Constructors work on the Machanghe grand bridge along the Guiyang-Pingtang Expressway in southwest China's Guizhou Province, Aug. 20, 2024. The main arch of the Machanghe grand bridge along the Guiyang-Pingtang Expressway was successfully joined on Wednesday. The bridge has a length of 381.5 meters with an arch spanning 260 meters. (Xinhua/Yang Wenbin)

　　A drone photo shows constructors working on the Machanghe grand bridge along the Guiyang-Pingtang Expressway in southwest China's Guizhou Province, Aug. 20, 2024. The main arch of the Machanghe grand bridge along the Guiyang-Pingtang Expressway was successfully joined on Wednesday. The bridge has a length of 381.5 meters with an arch spanning 260 meters. (Xinhua/Yang Wenbin)

　　A drone photo shows the Machanghe grand bridge under construction along the Guiyang-Pingtang Expressway in southwest China's Guizhou Province, Aug. 20, 2024. The main arch of the Machanghe grand bridge along the Guiyang-Pingtang Expressway was successfully joined on Wednesday. The bridge has a length of 381.5 meters with an arch spanning 260 meters. (Xinhua/Yang Wenbin)

　　Constructors work on the Machanghe grand bridge along the Guiyang-Pingtang Expressway in southwest China's Guizhou Province, Aug. 20, 2024. The main arch of the Machanghe grand bridge along the Guiyang-Pingtang Expressway was successfully joined on Wednesday. The bridge has a length of 381.5 meters with an arch spanning 260 meters. (Xinhua/Yang Wenbin)

　　A drone photo shows the Machanghe grand bridge under construction along the Guiyang-Pingtang Expressway in southwest China's Guizhou Province, Aug. 21, 2024. The main arch of the Machanghe grand bridge along the Guiyang-Pingtang Expressway was successfully joined on Wednesday. The bridge has a length of 381.5 meters with an arch spanning 260 meters. (Xinhua/Yang Wenbin)