In June 2018,¡À1100kV UHV DC Power Transmission Line Project (Changji-Guquan) has passed final inspection and electrification testing, with salient features satisfying national standards. The line has longest distance (3288.8km) with highest voltage level and largest transmission capacity around the world.  

It is a demo project developed to follow the world's energy interconnection strategy, starting from the Converter Substation in Changji, Xinjiang and ¡À1100kV terminating at the Converter Substation in Guquan, Anhui Province. The 3288.8km UHV DC transmission line with capacity of 12000MW runs across Xinjiang, Gansu, Ningxia, Shaanxi, Henan and Anhui in China. The development of the project will be of great importance to air pollution prevention and control, regional economic growth and the implementation of China's Belt and Road Initiative.

Yongfu Power provided design services for transmission line Package No.22, including FEED design, detailed design and site support technical services. It is the first time in the world that ¡À1100kV DC transmission line runs across 110kV and 1,000kV AC power transmission lines.  

Yongfu strictly complied with the standards and specification as stipulated in the design service contract, submitted design documents/reports/calculations and provided on-site technical service during the construction. Yongfu was highly recognized by the Owner and the EPC contractor.