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 and a coastline of 3,400 meters. 

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.

Yiu Lian Dockyard, founded in 1989, is one of the wholly owned subsidiaries of the China Merchants Industry Holdings Co., Ltd. (CMIH), the first-grade subordinate enterprise of China Merchants, and is mainly engaged in the repairing and refitting business of various ocean-going ships and drilling platforms. The target products include: the repairing and refitting of VLCC, cruise liners, large container ships, FPSO, FSO, LNG carriers and other various high-end ships, and repairing and refitting of offshore oil drilling platform.

With the strong support of China Merchants Group of Hongkong and its parent company CMIH, it strives to exploit market overseas, constantly improves management level, strengthens the sense of service and increases equipment. 

The shipyard is the first LNG repairing shipyard in China as it started repairs since 2017, while it holds a large market share in repairing offshore structures and cruise vessels.