Hangzhou Donghua Chain Group Co., Ltd., one of the largest chain manufacturers in China, has five subsidiaries including Hangzhou Ziqiang Chain Drive Co., Ltd. Hangzhou Dunpai Chain Co., Ltd. and Hangzhou Donghua Power Transmission IMP. & EXP. Co., Ltd. etc. Hangzhou Donghua Chain Group Co., Ltd. was founded in November 1991.

The company is specialized in producing all kinds of standard chains and special chains, e. g. A or B series chains, automobile chains, stainless steel chains, combine harvester chains, heavy-duty cranked link transmission chains, stereo garage chains and maintenance-free chains etc. In recent years, it invests the capital and depends on the improvement of technology to accelerate the step of new product development and the step of technology reform. It intends to produce high strength and precision chains in order to meet requirements of the domestic and overseas markets.