Construction began yesterday on the world’s largest clean-energy high-voltage direct-current transmission project, which will carry electricity from southeastern Xizang to the Guangdong–Hong Kong–Macao Greater Bay Area, China Southern Power Grid Co. Ltd. announced. The 2,681-km route runs across Xizang, Yunnan, Guangxi, and Guangdong — from Xizang’s Changdu to Shenzhen. When commissioned in 2029, it is expected to deliver over 43 billion kilowatt‑hours of electricity annually