A power transmission project spanning 2,290 km from northwest China's Xinjiang Uygur Autonomous Region to southwest Chongqing Municipality is expected to promote energy security and carbon neutrality. 

Launched on Tuesday, the Hami-Chongqing ±800kV ultra-high voltage direct current power transmission project will cross over five provincial-level regions to send power from the power-resource-rich Hami City to Chongqing's Yubei District. 

"The total investment of the project is 28.6 billion yuan (about $3.97 billion), and it may directly spur economic investment of 57.6 billion yuan. The economic benefits are significant," said Xu Yubo, the manager of the project. 

The project features a huge proportion of green electricity, with wind and solar power accounting for more than half of all the electricity transmitted to Chongqing. 

The project is expected to reduce Chongqing's carbon emissions by over 16 million tonnes. 

"After the project is completed, it will be able to meet the needs of about one-fifth of Chongqing's electricity consumption," Xu said. 

And the project is also expected to add about 20,000 jobs and boost the local economy. 

At the project launching ceremony on Tuesday, top officials from Xinjiang and Chongqing stressed building a new energy system, peaking carbon emissions and achieving carbon neutrality. 

They also said the project, built by the State Grid Corporation of China, will help realize the complementary advantages of integrating different resources and securing national energy supplies. 

"Substantial investment in electric power infrastructure with high technology input and many related industries serve as a ballast and a booster for steady growth," said Xin Bao'an, the executive chairman of the State Grid Corporation of China. 

Xin also said that when the project is completed in 2025, it will add to Xinjiang's new energy power capacity, and further enhance common prosperity in China.