Ecuador plans to auction off more than three million hectares of pristine Amazonian rainforest to Chinese oil companies, angering indigenous groups and underlining the global environmental toll of China's insatiable thirst for energy.

On Monday morning a group of Ecuadorean politicians pitched bidding contracts to representatives of Chinese oil companies at a Hilton hotel in central Beijing, on the fourth leg of a roadshow to publicise the bidding process. Previous meetings in Ecuador's capital, Quito, and in Houston and Paris were each confronted with protests by indigenous groups.

Attending the roadshow were black-suited representatives from oil companies including China Petrochemical and China National Offshore Oil. "Ecuador is willing to establish a relationship of mutual benefit – a win-win relationship," said Ecuador's ambassador to China in opening remarks.

According to the California-based NGO Amazon Watch, seven indigenous groups who inhabit the land claim that they have not consented to oil projects, which would devastate the area's environment and threaten their traditional way of life.