Since the 1970s, Dalian Shipbuilding Industry Co., Ltd. (then known as the Hongqi Shipyard) has been involved in the offshore engineering equipment construction. In November 1971, the shipyard constructed and delivered China's first offshore jack-up drilling rig, "Bohai No. 1." Over the next thirty years, the company achieved numerous world firsts and firsts in China. DSOC, as the offshore division of Dalian Shipbuilding Industry Group Co., Ltd., inherited the offshore business and construction experience of the group, while also inheriting the spirit of daring exploration and relentless struggle.

On September 8, 2006, DSOC was established. Over the next decade, the company successfully delivered more than fifty turnkey projects, including various high-specification jack-up drilling rigs, semi-submersible drilling rigs, drilling support units, municipal bridges, oil and gas processing modules, and various rig repair projects. The cumulative output value of these projects reached over CNY 36 billion, making DSOC a leader in the field of offshore equipment construction. Leaders at all levels have visited DSOC base on multiple occasions and have highly praised the company's outstanding performance.

In the face of the global green and low-carbon energy transformation and energy structure adjustment, DSOC decisively seizes market development opportunities and actively explores the market of green and clean energy products. With the successful undertaking and delivery of a series of high-quality, high-tech, and high value-added products, the company has completed its strategic transformation, achieved diversification and upgrading of product structure, and won extensive praise and recognition from mainstream energy companies, ship owners, and customers at home and abroad. At the same time, DSOC deftly charts its strategic course, steadfastly honing in on core goals as it navigates the steadying seas of the traditional offshore engineering market. With deliberate and strategic moves toward seller's market dominance, it aims to orchestrate the divestment of its existing rigs, ensuring that every action taken aligns with the overarching ambition of amplifying the company's long-term prosperity.

On September 15, 2023, the company was officially renamed Dalian Shipbuilding Offshore Co., Ltd.,. History shapes the present, and the present shapes the future. DSOC will leverage its rich experience accumulated over the years in the traditional high-end offshore equipment manufacturing field. With the advantage of regional industrial clusters, DSOC will simultaneously focus on expanding its product market in the environmental protection and clean energy sectors. This approach aims to achieve synergistic development in both the traditional offshore engineering and emerging energy industries. DSOC will always bear in mind the instructions of the Party and State leaders, living up to the trust and support given by the government, shareholders, and various sectors of society. It will continue to contribute to the country's maritime strategy and the local maritime economy.