China said it has talked with countries downstream about its new dam project in Tibet, a massive undertaking that will affect a key source of water for India and Bangladesh.

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

China's Premier Li Qiang announced the start of construction on what will be the world's largest hydropower dam, located on the eastern rim of the Tibetan plateau and estimated to cost around $170 billion,