1. Electrical safety equipment: Hi-pot withstand voltage tester, high voltage switching of insulation resistance tester 2. New energy: BMS high-voltage insulation detection circuit and high-voltage voltage sampling channel 3, ATE semiconductor test, high voltage probe station, capacitor withstand voltage aging test 4, electrostatic equipment, small high-voltage power supply, laser drive, X-ray small power supply 5. High-voltage test matrix for medical high-voltage equipment and cables