Hangzhou Donghua Chain Group Co., Ltd. (original Hangzhou Donghua Chain general company), was founded in November, 1991. With its five wholly owned subsidiaries, including Hangzhou Ziqiang Chain Drive Co., Ltd and Jiangsu Xinghua Gear Factory being a wholly owned company under Donghua in 2007, it is a professional manufacturer of chains, sprockets, tooth gears and various power transmission products, and it is one of the top 500 domestic private enterprises and the chain drive branch general of China Mechanical General Components Industry Association.

The group has DONGHUA, ZIQIANG, and DUNPAI three brands with DONGHUA has been recognized as China well known brand in 2008, ZIQIANG chain was awarded with "famous product of Zhejiang Province" and "famous brand of Zhejiang Province". The group is focused on producing all variety of standard roller chains and special chains, such as conveyor chain, stainless steel chain, agricultural chain and has not just sold its products all over China, but also sold more than 65% products to oversees, including Europe, America, South-east Asia, and it also has set up storage logistics in places like Europe. With Donghua brand registered in more than 70 countries like America, Europe, Japan and so on, it has partners among world top enterprises, such as JOHNDEERE, NEW Holland, CLAAS, Honda, KUBOTA, YANMAR, etc.