Workers install fixture wire at the Barkol convertor station of the Hami-Chongqing 800 kilovolt ultra-high voltage direct current (UHV DC) power transmission project in Hami, northwest China's Xinjiang Uygur Autonomous Region, March 21, 2025. (Xinhua/Ding Lei)HAMI, March 22 (Xinhua) --The Hami-Chongqing 800 kilovolt ultra-high voltage direct current (UHV DC) power transmission project enters its final construction phase as the Barkol convertor station in Xinjiang starts adjusting and testing.With a total investment of 28.6 billion yuan (about 3.9 billion U.S. dollars), the 2,290-km power line winds from Hami of northwest China's Xinjiang Uygur Autonomous Region to Yubei District of southwest China's Chongqing Municipality. When fully operational before the end of 2025, the project is expected to transmit over 36 billion kWh of electricity to Chongqing every year.Workers install devices at the Barkol convertor station of the Hami-Chongqing 800 kilovolt ultra-high voltage direct current (UHV DC) power transmission project in Hami, northwest China's Xinjiang Uygur Autonomous Region, March 21, 2025. (Xinhua/Ding Lei)A drone photo taken on March 21, 2025 shows workers installing fixture wire at the Barkol convertor station of the Hami-Chongqing 800 kilovolt ultra-high voltage direct current (UHV DC) power transmission project in Hami, northwest China's Xinjiang Uygur Autonomous Region.(Photo by Li Song/Xinhua)An aerial drone photo taken on March 21, 2025 shows the Barkol convertor station of the Hami-Chongqing 800 kilovolt ultra-high voltage direct current (UHV DC) power transmission project in Hami, northwest China's Xinjiang Uygur Autonomous Region. (Xinhua/Ding Lei)Workers work at the Barkol convertor station of the Hami-Chongqing 800 kilovolt ultra-high voltage direct current (UHV DC) power transmission project in Hami, northwest China's Xinjiang Uygur Autonomous Region, March 21, 2025. (Xinhua/Ding Lei)Workers measure the elevation at the Barkol convertor station of the Hami-Chongqing 800 kilovolt ultra-high voltage direct current (UHV DC) power transmission project in Hami, northwest China's Xinjiang Uygur Autonomous Region, March 21, 2025. (Xinhua/Ding Lei)Workers install devices at the Barkol convertor station of the Hami-Chongqing 800 kilovolt ultra-high voltage direct current (UHV DC) power transmission project in Hami, northwest China's Xinjiang Uygur Autonomous Region, March 21, 2025. (Xinhua/Ding Lei)Workers install fixture wire at the Barkol convertor station of the Hami-Chongqing 800 kilovolt ultra-high voltage direct current (UHV DC) power transmission project in Hami, northwest China's Xinjiang Uygur Autonomous Region, March 21, 2025. (Xinhua/Ding Lei)An aerial drone photo taken on March 21, 2025 shows the Barkol convertor station of the Hami-Chongqing 800 kilovolt ultra-high voltage direct current (UHV DC) power transmission project in Hami, northwest China's Xinjiang Uygur Autonomous Region. (Xinhua/Ding Lei)Workers install fixture wire at the Barkol convertor station of the Hami-Chongqing 800 kilovolt ultra-high voltage direct current (UHV DC) power transmission project in Hami, northwest China's Xinjiang Uygur Autonomous Region, March 21, 2025. (Xinhua/Ding Lei)Workers install fixture wire at the Barkol convertor station of the Hami-Chongqing 800 kilovolt ultra-high voltage direct current (UHV DC) power transmission project in Hami, northwest China's Xinjiang Uygur Autonomous Region, March 21, 2025. (Xinhua/Ding Lei)A drone photo taken on March 21, 2025 shows workers installing fixture wire at the Barkol convertor station of the Hami-Chongqing 800 kilovolt ultra-high voltage direct current (UHV DC) power transmission project in Hami, northwest China's Xinjiang Uygur Autonomous Region. (Photo by Feng Yang/Xinhua)An aerial drone photo taken on March 21, 2025 shows a view of the Hami-Chongqing 800 kilovolt ultra-high voltage direct current (UHV DC) power transmission project in Hami, northwest China's Xinjiang Uygur Autonomous Region. (Xinhua/Ding Lei)Workers adjust background system at the Barkol convertor station of the Hami-Chongqing 800 kilovolt ultra-high voltage direct current (UHV DC) power transmission project in Hami, northwest China's Xinjiang Uygur Autonomous Region, March 21, 2025. (Xinhua/Ding Lei)An aerial drone photo taken on March 21, 2025 shows a view of the Hami-Chongqing 800 kilovolt ultra-high voltage direct current (UHV DC) power transmission project in Hami, northwest China's Xinjiang Uygur Autonomous Region. (Xinhua/Ding Lei)