Aerial photo taken on Aug. 9, 2018 shows the Beipanjiang Bridge veiled by clouds in the junction of southwest China's Guizhou Province and Yunnan Province. (Xinhua/Ou Dongqu)

Aerial photo taken on Aug. 9, 2018 shows the Beipanjiang Bridge veiled by clouds in the junction of southwest China's Guizhou Province and Yunnan Province. (Xinhua/Ou Dongqu)

Aerial photo taken on Aug. 9, 2018 shows the Beipanjiang Bridge veiled by clouds in the junction of southwest China's Guizhou Province and Yunnan Province. (Xinhua/Ou Dongqu)

Aerial photo taken on Aug. 9, 2018 shows the Beipanjiang Bridge veiled by clouds in the junction of southwest China's Guizhou Province and Yunnan Province. (Xinhua/Ou Dongqu)

Aerial photo taken on Aug. 9, 2018 shows the Beipanjiang Bridge veiled by clouds in the junction of southwest China's Guizhou Province and Yunnan Province. (Xinhua/Ou Dongqu)

Aerial photo taken on Aug. 9, 2018 shows the Beipanjiang Bridge veiled by clouds in the junction of southwest China's Guizhou Province and Yunnan Province. (Xinhua/Ou Dongqu)

Aerial photo taken on Aug. 9, 2018 shows the Beipanjiang Bridge veiled by clouds in the junction of southwest China's Guizhou Province and Yunnan Province. (Xinhua/Ou Dongqu)

Aerial photo taken on Aug. 9, 2018 shows the Beipanjiang Bridge veiled by clouds in the junction of southwest China's Guizhou Province and Yunnan Province. (Xinhua/Ou Dongqu)

Aerial photo taken on Aug. 9, 2018 shows the Beipanjiang Bridge veiled by clouds in the junction of southwest China's Guizhou Province and Yunnan Province. (Xinhua/Ou Dongqu)

Aerial photo taken on Aug. 9, 2018 shows the Beipanjiang Bridge veiled by clouds in the junction of southwest China's Guizhou Province and Yunnan Province. (Xinhua/Ou Dongqu)