Zhengmao Group Co., Ltd., formerly known as Zhenjiang Anchor Chain Factory, was founded in 1974 and is China's first modern electric welding anchor chain manufacturer. The mooring chain and anchor chain developed and produced by the company are the two pillar products. The "Sanshan" brand logo used is a famous trademark in Jiangsu Province. The company has been awarded the title of "National High-tech Enterprise" for 10 consecutive years.