Zhengmao Group Co., Ltd. was formerly the Zhenjiang Anchor Chain Factory. It was founded in 1974 and is a modern welding anchor chain manufacturing enterprise. The mooring chain and marine anchor chain developed and produced by the company are two pillar products. The company has won the title of "National High-tech Enterprise" for 13 consecutive years. The company has developed into a professional production enterprise with multiple varieties, complete specifications, annual production of marine anchor chains and mooring chains of 120,000 tons.

The company has 14 sets of production lines/set chains, 6 sets of vertical heat treatment furnaces, 1 400 tons fatigue testing machine, 2000KN, 5000KN, 12000KN, 24000KN, 40000KN, 40000KN, and 5 anchor chain tension testing equipment, as well as various metal cutting Machine tools and forging machines and other equipment. The company also has a testing center and has passed CNAS certification.

Main products: 24mm~172mm M2 and M3 grade marine anchor chains and supporting accessories, 54mm~208mm R3, R3s, R4, R4S, R5 grade marine engineering mooring chains and supporting accessories. In June 2019, the company became an enterprise that passed the DNV Classification Society R6 mooring chain certification.

As a pioneer in the domestic mooring chain industry, the company has more than 20 years of offshore engineering experience and provides a complete set of offshore neat package services, covering the overall design of mooring systems, supporting series of product procurement and installation services, and its products are widely used in single-point systems In the fields of docking systems, floating tubes, floating production and oil storage systems, mobile marine drilling devices, marine aquaculture and offshore wind power.

At the end of 1996, the company was the first to pass the ISO9001 quality system certification in its domestic industry. In 2008, the company passed the certification of the occupational health and safety management system and the environmental management system. The marine anchor chains and accessories produced by the company have successively obtained certification from 11 classification societies in China, the United Kingdom, Germany, the United States, Norway, Japan, France, Russia, India, Italy and South Korea. The company's R3, R3s, R4, R4S, R5 and R6 mooring chains are manufactured by the company, and are in line with DNV (Norway), ABS (US), LR (UK), BV (France), CCS (China) ships rated society standardized and obtained a certificate of recognition. Mooring chain products passed the company's quality system review and certification by the American Petroleum Association API in November 1999 and obtained the right to use the API logo. The "Sanshan" brand anchor chain is exported to more than 30 countries and regions including Japan, South Korea, Germany, Norway, Brazil and Southeast Asia, and has become a national export base for mechanical and electrical products.