Dongguan huangzhonghuang Electronics Co., Ltd. Specializing in the design, testing and development of flexible conductive contacts, huangzhonghuang Electronics has developed new bi-directional spiral spring contacts, single-turn spring contacts, torsion spring jacks, cylindrical quick-plug self-locking connectors, male and female co-locking connectors, electric vehicle chargers, high-voltage power pack series connectors, etc.