Recently, the high-altitude ultra-high-voltage (UHV) test hall project in Xizang, for which CQEC’s Industrial Institute was responsible for the feasibility study and construction design, was officially put into operation. Located at Yangbajing High-Altitude Test Base at an elevation of 4,300 meters, the project has a total floor area of 7,654 square meters. The UHV test hall measures 96 meters in length, 69 meters in width and 70 meters in height, making it the world’s highest-altitude UHV test facility