East Electrochemical (China) Investment Co., Ltd. is a group company of TDK Co., Ltd., which was established in Shanghai, China in 2004 and is the headquarters of China. TDK was founded in 1935. TDK's main products are passive components, that is, various basic components widely used in electrical and electronic equipment such as ferrite cores, coils, transformers, ceramic capacitors and sensors. Based on the high-tech and core skills accumulated so far, we actively research and manufacture magnetic heads, magnets, power supplies, batteries and other equipment.