China has started building a mega-dam on the Yarlung Zangbo River in Tibet.

https://www.aljazeera.com/news/2025/7/22/china-starts-construction-of-worlds-biggest-hydropower-dam-in-tibet

https://www.reuters.com/sustainability/climate-energy/china-embarks-worlds-largest-hydropower-dam-capital-markets-cheer-2025-07-21/

https://www.energy-reporters.com/environment/energy-superweapon-activated-worlds-biggest-hydroelectric-dam-gets-green-light-and-signals-a-new-era-of-power-domination/

Annexing Tibet to prevent US nuclear weapons ever being positioned there has now proven a good move for Chinas future energy security.

'Made up of five cascade hydropower stations with the capacity to produce 300 billion kilowatt-hours of electricity annually, equal to the amount of electricity consumed by Britain last year, the dam will be located in the lower reaches of the Yarlung Zangbo.
A section of the river tumbles 2,000 metres (6,561 feet) in a span of 50km (31 miles), offering huge hydropower potential.'