Jinping - South Jiangsu ± 800 kV HVDC transmission line project started construction in 2011, TG Group won the project of ACSR 6,000 tons. The project has a total length of 2059 km and investment of 22 billion RMB. It is another important green energy channel for the transmission of electricity from the west to the east in China. It is the largest DC transmission project with the largest transmission capacity, the farthest transmission distance and the highest voltage level in the world, which improved independent innovation capability of China's power transmission industry , and promote the upgrading of China's power grid technology, on behalf of the current world's highest level of HVDC technology, it has a good economic and social benefits.