TDG Holding Co., Ltd. and its subsidiaries research, develop, manufacture, and sell electronic materials, digital devices, and smart equipment in China and internationally. Its electronic materials include ferrite sheets for NFC antennas, soft ferrite cores for wireless chargers and LED power supplies, soft magnetic cores for automotive electronics, EV wireless charging, and new energy applications, as well as NiZn ferrites, metal powder cores, sapphire crystal products, and piezo-electric crystal materials. The company also provides high-frequency and microwave components and modules, molding choke inductors, electronic manufacturing services, and equipment for powder materials and crystal growth. Founded in 1984, TDG Holding is headquartered in Haining, China, and exports its products.