Chinese authorities have begun constructing what will be the world's largest hydropower dam in Tibetan territory, in a project that has sparked concerns from India and Bangladesh. Chinese Premier Li Qiang presided over a ceremony marking the start of construction on the Yarlung Tsangpo river on Saturday, according to local media.

The ground-breaking ceremony for the $137 billion project, which will give Beijing upstream control over a critical river, has been performed

The dam will be located in the lower reaches of the Yarlung Zangbo. India and Bangladesh have already raised concerns about its possible impact on the millions of people who live downstream.