On May 9, Song Lin, a staff member of Qinghai Electric Power Research Institute of State Grid, commissioned the equipment in the high-voltage experimental hall.

On the same day, the Qinghai Electric Power Research Institute of State Grid Qinghai Electric Power Company carried out air clearance test in the high-altitude and high-voltage laboratory high-voltage experimental hall in Xining City under high-altitude and high-dry environment (+800 kilovolt) UHV valve hall. This research will provide technical support for the smooth implementation of Qinghai-Henan (+800 KV) UHVDC project, and is of great significance to the research of UHV and UHV transmission and transformation equipment in high altitude areas of China.