China Southern Power Grid invests in, constructs and operates power grids in the southern provinces of Guangdong, Guangxi, Yunnan, Guizhou and Hainan. Featuring long distance, extra high voltage and hybrid AC/DC operation, it operates one of the most sophisticated and technically advanced power grids in the world. Its grid spans 2,000 kilometres and a total installed capacity of 310 GW, totalling 18 channels in the West-to-East Power Transmission Project, with a maximum transmission capacity of 50 GW. The company owns several patents and standards and is a leader in UHVDC and VSC-HVDC.