Burma pro-democracy leader Aung San Suu Kyi has joined forces with environmentalists and minority groups with an appeal for a rethink of a large dam project.
Suu Kyi urged the Myanmar and Chinese governments to re-examine the project on the Irrawaddy River in the interest of national and international harmony.
The Nobel peace prize winner called the waterway "the most significant geographical feature of our country."
Environmental groups, members of the Kachin ethnic minority and other people living along the river say the Myanmar-China Myitsone Hydroelectric Project in northern Kachin state will displace villagers and upset the ecology of the important food source.
The 3.6 billion dollar (£3.1 billion) dam being built by China in the Kachin heartland is expected to flood an area the size of Singapore.
The Burmese government has not said how much of the energy will be sold to China.
In her appeal, Suu Kyi said some 12,000 people from 63 villages have been relocated and it is not clear whether they will be fairly compensated.
The government said only 2,146 people from five villages had been relocated.
For decades, several ethnic groups have waged guerrilla wars for greater autonomy, including more control over resources in their regions. In March, fighting broke out between the 8,000-strong Kachin militia and the government.
That fighting was related to dams and other large projects being built by China.