Currently, XJ possesses fully independent intellectual property rights for the DPS-3000 and DPS-5000 series DC control and protection complete sets, capable of meeting the requirements of ±1100kV and below ultra-high voltage DC transmission, high-voltage DC transmission, and flexible DC transmission projects. XJ has developed a comprehensive solution service capability that includes system simulation research, system turnkey design, core equipment R&D, production testing, installation and commissioning, operation and maintenance support, project management, and quality management. The core technology application level is domestically leading and is widely applied in China's large power grid interconnection and long-distance high-capacity transmission.