The Mazhou Island Base is a large-scale ship repair and offshore building base invested by China Merchants Industry Holdings Co., Ltd. The total area of the base is 700,000 square meters. It has a coastline of 3,400 meters and is equipped with two dry docks with the size 400mX83mX14m and 360mX67mX14.5m and two floating docks with the capacity 70,000-ton and 30,000-ton. Now the base is one of the largest ship repair and offshore building bases in China.

There are two companies in the base: One is China Merchants Heavy Industry (Shenzhen) Co., Ltd., which is mainly engaged in the construction of offshore equipment and special engineering vessels. And the other is Yiu Lian Dockyards (Shekou) Co., Ltd., which primarily repairs and refits large ships and offshore equipment.

China Merchants Heavy Industry (Shenzhen) Co., Ltd. is a large-scalekey enterprise wholly owned by China Merchants Industry Holdings Co., Ltd. It is affiliated to the large-scalestate-owned key enterprises China Merchants Group.

China Merchants Heavy Industry (Shenzhen) Co., Ltd. was first established in June 1993.Carrying on the 100-year corporate culture of China Merchants Group, CMHI is committed to the construction of marine engineering equipment and special engineering vessels. As the main participants in the construction of offshore equipment and special vessels, also as the country's largest self-elevating platform builder, CMHI wason theshortlist of the first batch of seven offshore white-listed enterprises in China.

CMHI's target products include: offshore jack-up drilling platforms, mobile multi-purpose drilling platforms, drilling modules, living modules, luxury cruises, LNG carriers, diving support vessels, offshore cranes, pipe laying vessels, dredgers, cable boats, drilling vessels and many other kinds of special engineering vessels.

Since the company’s target products shifted to marine engineering and special vessels in 2006, CMHI has successfully built and delivered more than 10 CJ46 jack-up rigs, multi-purpose platforms and offshore wind power installation platforms; 4,500 m3/h cutter suction dredger, 11,000 square meters suction dredger; 50,000 tons and 30,000 tons self-propelled semi-submersible vessels; multi-purpose diving support vessels and other marine engineering special vessels. CMHI has created the "China Merchants Heavy Industry" brand in the field of offshore equipment and special vessel construction.As our own research and development capabilities improve, CMHI has formed self-elevating offshore platform batch construction mode that is in line with the international high-end offshore engineering. And CMHI has become a famous branded builder of the self-elevating platform, winning wide range of praise from domestic and foreign customers in aspect of construction quality and duration guarantee.

China Merchants Heavy Industry Co., Ltd. is a state-level high-tech enterprise with a CNAS-certified “National Physical and Chemical Laboratory” and a CCS-certified “Offshore Facility Testing Agency”. Our technology center is one of the Shenzhen City-level Technology Centers, and it has established the “self-elevating platform design and development engineering laboratory”. The company's engineering vessels and large offshore equipment research and technology center has gathered a group of high-level and experienced designers, and it has assembled a high-quality technical research and development team. These ensure that CMHI has a strong ability in both basic design and detailed design.