China on Sunday commenced the construction of an ultra-high voltage direct current transmission line linking two provincial-level regions, according to the State Grid Corporation of China. Stretching a total of 1,634 km, the electricity transmission project starts in northwest China’s Ningxia Hui Autonomous Region and ends in the central province of Hunan. It passes through six provincial-level regions across the country. The project has a rated voltage of ?800 kV and a rated transmission capacity of 8 million kilowatts, with a total investment of 28.1 billion yuan (about 3.95 billion U.S. dollars), said the company.