An aerial drone photo taken on Sept. 23, 2025 shows the Tianmen grand bridge under construction in southwest China's Guizhou Province. The Tianmen grand bridge on the Anshun-Panzhou highway, with a length of 1,553 meters and the bridge floor hung about 560 meters above the canyon water, finished its closure on Tuesday. (Xinhua/Liu Xu)

An aerial drone photo taken on Sept. 23, 2025 shows the Tianmen grand bridge under construction in southwest China's Guizhou Province. The Tianmen grand bridge on the Anshun-Panzhou highway, with a length of 1,553 meters and the bridge floor hung about 560 meters above the canyon water, finished its closure on Tuesday. (Xinhua/Liu Xu)

An aerial drone photo taken on Sept. 23, 2025 shows the Tianmen grand bridge under construction in southwest China's Guizhou Province. The Tianmen grand bridge on the Anshun-Panzhou highway, with a length of 1,553 meters and the bridge floor hung about 560 meters above the canyon water, finished its closure on Tuesday. (Xinhua/Liu Xu)

An aerial drone photo taken on Sept. 23, 2025 shows the Tianmen grand bridge under construction in southwest China's Guizhou Province. The Tianmen grand bridge on the Anshun-Panzhou highway, with a length of 1,553 meters and the bridge floor hung about 560 meters above the canyon water, finished its closure on Tuesday. (Xinhua/Liu Xu)

An aerial drone photo taken on Sept. 23, 2025 shows the Tianmen grand bridge under construction in southwest China's Guizhou Province. The Tianmen grand bridge on the Anshun-Panzhou highway, with a length of 1,553 meters and the bridge floor hung about 560 meters above the canyon water, finished its closure on Tuesday. (Xinhua/Liu Xu)

An aerial drone photo taken on Sept. 23, 2025 shows the Tianmen grand bridge under construction in southwest China's Guizhou Province. The Tianmen grand bridge on the Anshun-Panzhou highway, with a length of 1,553 meters and the bridge floor hung about 560 meters above the canyon water, finished its closure on Tuesday. (Xinhua/Liu Xu)