Photo taken on Sept. 1, 2020 shows the construction site of Kaizhou Lake grand bridge of Weng'an-Kaiyang expressway in southwest China's Guizhou Province. The cable saddles on the main tower of Kaizhou Lake grand bridge of Weng'an-Kaiyang expressway were successfully installed on Tuesday. (Xinhua/Liu Xu)

Aerial photo taken on Sept. 1, 2020 shows the construction site of Kaizhou Lake grand bridge of Weng'an-Kaiyang expressway in southwest China's Guizhou Province. The cable saddles on the main tower of Kaizhou Lake grand bridge of Weng'an-Kaiyang expressway were successfully installed on Tuesday. (Xinhua/Liu Xu)

Photo taken on Sept. 1, 2020 shows workers working on the construction site of Kaizhou Lake grand bridge of Weng'an-Kaiyang expressway in southwest China's Guizhou Province. The cable saddles on the main tower of Kaizhou Lake grand bridge of Weng'an-Kaiyang expressway were successfully installed on Tuesday. (Xinhua/Liu Xu)

Photo taken on Sept. 1, 2020 shows the construction site of Kaizhou Lake grand bridge of Weng'an-Kaiyang expressway in southwest China's Guizhou Province. The cable saddles on the main tower of Kaizhou Lake grand bridge of Weng'an-Kaiyang expressway were successfully installed on Tuesday. (Xinhua/Liu Xu)

Aerial photo taken on Sept. 1, 2020 shows the construction site of Kaizhou Lake grand bridge of Weng'an-Kaiyang expressway in southwest China's Guizhou Province. The cable saddles on the main tower of Kaizhou Lake grand bridge of Weng'an-Kaiyang expressway were successfully installed on Tuesday. (Xinhua/Liu Xu)

Aerial photo taken on Sept. 1, 2020 shows the construction site of Kaizhou Lake grand bridge of Weng'an-Kaiyang expressway in County, southwest China's Guizhou Province. The cable saddles on the main tower of Kaizhou Lake grand bridge of Weng'an-Kaiyang expressway were successfully installed on Tuesday. (Xinhua/Liu Xu)

Photo taken on Sept. 1, 2020 shows the construction site of Kaizhou Lake grand bridge of Weng'an-Kaiyang expressway in southwest China's Guizhou Province. The cable saddles on the main tower of Kaizhou Lake grand bridge of Weng'an-Kaiyang expressway were successfully installed on Tuesday. (Xinhua/Liu Xu)

Aerial photo taken on Sept. 1, 2020 shows the construction site of Kaizhou Lake grand bridge of Weng'an-Kaiyang expressway in southwest China's Guizhou Province. The cable saddles on the main tower of Kaizhou Lake grand bridge of Weng'an-Kaiyang expressway were successfully installed on Tuesday. (Xinhua/Liu Xu)

Aerial photo taken on Sept. 1, 2020 shows the construction site of Kaizhou Lake grand bridge of Weng'an-Kaiyang expressway in southwest China's Guizhou Province. The cable saddles on the main tower of Kaizhou Lake grand bridge of Weng'an-Kaiyang expressway were successfully installed on Tuesday. (Xinhua/Liu Xu)