There are treaties among riparian neighbours in South and Southeast Asia, but not between China and its neighbours. For example, the lower Mekong states of Thailand, Cambodia, Laos, and Vietnam have a water treaty. India has water-sharing treaties with both the countries located downstream -- Bangladesh and Pakistan. There are also water treaties between India and its two small upstream neighbours, Nepal and Bhutan. But China, the dominant riparian power of Asia, refuses to enter into water-sharing arrangements with any of its neighbours.