Ningbo Changzhen Copper Co., LTD., founded in 1984, is a green circular economy enterprise specialized in producing middle and high-end brass alloy bar, wire and special-shaped products with scrap copper as raw material. The factory covers an area of 92,000 square meters and has 420 employees, among which 80 are professional technicians and more than 20 have intermediate and senior titles. The company's leading product "Changzhen" environment-friendly copper material is widely used in electronics, electrical appliances, kitchen, communication, auto parts, refrigeration, fire equipment and other industries. Its market share ranks the third in China. In 2014, it was recognized as one of the top ten enterprises of copper bar wire in China.