Aerial photo taken on May 30, 2019 shows the Chishui River Bridge of Gulin-Xishui highway under construction on the border between southwest China's Sichuan Province and Guizhou Province. Two sides of the Chishui River Bridge of Gulin-Xishui highway connecting southwest China's Sichuan Province and Guizhou Province across the Chishui River were joined together on Thursday. (Photos: Xinhua)

Aerial photo taken on May 30, 2019 shows the Chishui River Bridge of Gulin-Xishui highway under construction on the border between southwest China's Sichuan Province and Guizhou Province. Two sides of the Chishui River Bridge of Gulin-Xishui highway connecting southwest China's Sichuan Province and Guizhou Province across the Chishui River were joined together on Thursday.

Aerial photo taken on May 30, 2019 shows the Chishui River Bridge of Gulin-Xishui highway under construction on the border between southwest China's Sichuan Province and Guizhou Province. Two sides of the Chishui River Bridge of Gulin-Xishui highway connecting southwest China's Sichuan Province and Guizhou Province across the Chishui River were joined together on Thursday.

Aerial photo taken on May 30, 2019 shows the Chishui River Bridge of Gulin-Xishui highway under construction on the border between southwest China's Sichuan Province and Guizhou Province. Two sides of the Chishui River Bridge of Gulin-Xishui highway connecting southwest China's Sichuan Province and Guizhou Province across the Chishui River were joined together on Thursday.

Aerial photo taken on May 30, 2019 shows the Chishui River Bridge of Gulin-Xishui highway under construction on the border between southwest China's Sichuan Province and Guizhou Province. Two sides of the Chishui River Bridge of Gulin-Xishui highway connecting southwest China's Sichuan Province and Guizhou Province across the Chishui River were joined together on Thursday.

Aerial photo taken on May 30, 2019 shows the Chishui River Bridge of Gulin-Xishui highway under construction on the border between southwest China's Sichuan Province and Guizhou Province. Two sides of the Chishui River Bridge of Gulin-Xishui highway connecting southwest China's Sichuan Province and Guizhou Province across the Chishui River were joined together on Thursday.