On January 8, 2020, China Electric Power Research Institute (CEPRI) organized the related organizations and personnel to conduct on-site inspection of 12kV ring main unit (box) prototype of standardized design of Jiangsu Yisite Power Science and Technology Co., Ltd. The organizations participating in the on-site inspection included CEPRI, State Grid Jiangsu Electric Power Research Institute, and EETI（China National Center for Quality Supervision and Test of Electrical Apparatus Products）.

        The inspection personnel, according to the requirements of Customized Solutions to 12kV Ring Main Unit (Box) Prototype of Standardized Design, inspected the ring main unit (box) prototype of standardized design produced by Jiangsu Yisite Power Science and Technology Co., Ltd.  on the site, and formed the corresponding on-site inspection report.