Construction has started on piers for a bridge in Yuanjiang County in southwest China's Yunnan Province, which is claimed will be the tallest in the world.
The bridge is part of a new railway that will connect China with Laos. The Yuanjiang Bridge spans over the Yuanjiang River. Once completed, trains will be able to travel from Yunnan's Yuxi City to Mohan City before entering Laos.
It is 832m long and supported by six piers, with the tallest being 154m and the main span being 249m.