Group 1 - The company, New Special Electric, has focused on the research and manufacturing of various frequency conversion transformers since its establishment [1] - The multi-winding dry-type frequency conversion transformer (phase-shifting transformer) can be applied in data centers [1] - The company is paying attention to the development trends in the data center industry and is innovating in the research and development of solid-state transformers (SST) for supporting transformers, which is currently in the technical research phase [1]