The project on a river that runs through Tibet and India downstream could dwarf the Three Gorges Dam when completed.

The investment is set to benefit hydropower plant and grid equipment makers, but some analysts warn that market enthusiasm may wane soon.

At over 4,000 metres above sea level on the Yarlung Tsangpo, Tibet’s sacred river that becomes the Brahmaputra in India, the dam includes a system of five cascading plants that will produce enou