Xizang Autonomous Region, southwest China - Recent (CCTV - No access Chinese mainland)
1. Various of wind turbines, power transmission towers
2. Aerial shot of mountains
3. Aerial shots of construction site for Xizang-Guangdong power transmission project
4. Map showing route of Xizang-Guangdong power transmission project
5. Animations showing converter stations for Xizang-Guangdong power transmission project

Guangdong Province, south China - Recent (CCTV - No access Chinese mainland)
6. SOUNDBITE (Chinese) Dong Yanle, director of engineering construction, China Southern Power Grid (ending with shot 7):
"This project will adopt China's self-developed, internationally leading ±800 kV ultra-high-voltage (UHV) flexible direct current (DC) transmission technology, with a rated transmission capacity of 10 million kilowatts. The total investment will amount to 53.2 billion yuan (about 7.47 billion U.S. dollars)."
7. Various of power transmission towers, facilities, engineers
8. Various of cityscapes of Guangzhou, Shenshen

Xizang Autonomous Region, southwest China - Recent (CCTV - No access Chinese mainland)
9. Solar panels

Beijing China - Recent (CCTV - No access Chinese mainland)
10. SOUNDBITE (Chinese) Huang Yong, senior executive, State Grid Corporation of China (starting with shot 9/partially overlaid with shot 11):
"This is Xizang's first UHV flexible DC project designed to transmit power beyond the region. It will transform Xizang's abundant natural resources into economic advantages while tackling world-class engineering challenges, including DC transmission above 4,000 meters in altitude and safe and large-scale integration of renewable energy into the state grid in areas with weak power grids."
++SHOT OVERLAYING SOUNDBITE++

Xizang Autonomous Region, southwest China - Recent (CCTV - No access Chinese mainland)
11. Various of solar panels, construction site
++SHOT OVERLAYING SOUNDBITE++
12. Various of facilities, converter station, solar panels
13. Animations showing power stations, transmission facilities

China on Tuesday officially commenced the construction of groundbreaking Xizang-Guangdong ultra-high-voltage direct current (UHVDC) transmission project -- the world's most powerful, technologically advanced, with largest-investment flexible UHVDC power line to date.

Stretching about 2,681 kilometers, the power line will originate in southwest China's Xizang Autonomous Region, traverse the provincial regions of Yunnan and Guangxi, and terminate in south China's Guangdong Province.

Four converter stations will be built along the route -- in Changdu and Nyingchi cities in Xizang, and in Guangzhou and Shenzhen cities in Guangdong.

"This project will adopt China's self-developed, internationally leading ±800 kV ultra-high-voltage (UHV) flexible direct current (DC) transmission technology, with a rated transmission capacity of 10 million kilowatts. The total investment will amount to 53.2 billion yuan (about 7.47 billion U.S. dollars)," said Dong Yanle, head of engineering construction department at China Southern Power Grid.

Once fully operational in 2029, the project is expected to deliver over 43 billion kilowatt-hours of electricity annually to the Guangdong-Hong Kong-Macao Greater Bay Area -- equivalent to half of the Three Gorges Dam's annual output -- and all electricity transmitted will come from 100-percent clean, renewable sources.

"This is Xizang's first UHV flexible DC project designed to transmit power beyond the region. It will transform Xizang's abundant natural resources into economic advantages while tackling world-class engineering challenges, including DC transmission above 4,000 meters in altitude and safe and large-scale integration of renewable energy into the state grid in areas with weak power grids," said Huang Yong, a senior executive at the State Grid Corporation of China.

One of the biggest hurdles in the project stems from the intermittent nature of renewable power generation. The "multi-terminal UHV flexible DC" technology utilized in the project enables dynamic scheduling of renewable power generated at different times and locations, minimizing grid disturbances and ensuring uninterrupted supply.

Thanks to this cutting-edge technology, green electricity generated from Xizang can reach Guangdong in just 9 milliseconds, or 0.009 seconds, over 30 times faster than the blink of an eye.