For ±1100kV and below ultra-high voltage (UHV) DC and high-voltage (HV) DC transmission projects, XJ has developed a complete solution covering feasibility studies, system turnkey design, core equipment R&D, production testing, installation and commissioning, operation and maintenance support, project management, and quality management. Focusing on DC converter valves, water-cooling equipment, and valve control protection devices, XJ's core technology application is domestically leading. It is widely applied in China's large power grid interconnections and long-distance high-capacity power transmission. XJ has participated in the construction of all domestic UHV DC transmission projects, earning a strong industry reputation and solid performance track record.