The longest power lines, such as the Zhundong–South Anhui link, exclusively use High-Voltage Direct Current (HVDC) and Ultra-High-Voltage Direct Current (UHVDC) technology. Unlike traditional Alternating Current (AC) transmission, DC systems are far more efficient for transmitting large blocks of power over vast distances, resulting in lower power losses and a smaller environmental footprint. Our expertise in stringing equipment for both overhead and underground cables is crucial for the construction and maintenance of these advanced systems.