XINING, Nov. 7 (Xinhua) - Construction of an ultra-high voltage power transmission line to deliver clean energy began Wednesday.

The 1,587-km-long transmission line starts in Hainan Tibetan Autonomous Prefecture in northwest China's Qinghai Province and ends in Zhumadian City in central China's Henan Province, connecting Qinghai, Gansu, Shaanxi and Henan provinces.

The ultra-high voltage power transmission line was started in Gonghe County, Qinghai Province on November 7, 2018. (Photo: VCG)

According to the plan, the transmission line, with a capacity of eight million kilowatts, will be put into operation in 2020 and deliver electricity generated from solar power, wind and water from Qinghai to central China.

With an investment of 22.6 billion yuan ($3.26 billion), the transmission line is estimated to deliver electricity of 40 billion kilowatt-hours each year, which will help replace 18 million tonnes of raw coal, reduce 14,000 tonnes of dust emission, 90,000 tonnes of sulfur dioxide emission and 29.6 million tonnes of carbon dioxide emission.