On March 31, Henan Letone Ultra-High Voltage Equipment Co., Ltd. (hereinafter referred to as Letone Ultra-High Voltage Equipment), a wholly-owned subsidiary of Letone Technology, officially passed the on-site inspection by the American Society of Mechanical Engineers (ASME) joint inspection team and successfully obtained the ASME BPVC Section VIII Division 3 (U3) manufacturing license and steel stamp authorization.