Chongqing Gearbox Co., Ltd. (hereinafter referred to as "Hydraulic Gear") is a large state-owned enterprise mainly engaged in the research and development and production of high and low-speed heavy-duty gearboxes. The company is affiliated to China Shipbuilding Group Co., Ltd. (hereinafter referred to as "China Shipbuilding and Shipbuilding"). Located in Jiangjin District, Chongqing, it covers an area of ​​more than 900,000 square meters, has a total number of employees and a total assets of more than 7 billion yuan. The company was formerly the state-owned Yongjin Machinery Factory. It was founded in 1966. It was renamed Sichuan Gearbox Factory in 1982 and was reorganized into Chongqing Gearbox Co., Ltd. in 1997. The company takes hard-tooth surface gear transmission as its core business, and its products are widely used in shipbuilding, offshore engineering, cement building materials, metal smelting, traditional energy, distributed clean energy, rail transit, engineering machinery, oil and gas mining, solid waste treatment and other industries. It is a key enterprise in the production of ship gearboxes, couplings and shock absorbers in the ship system. It is one of the largest hard-tooth surface gear research and development bases in China and the development base for ship rear transmission devices.

The company is based in the field of mechanical transmission and actively expands into the field of electromechanical and hydraulic system integration. The company adheres to the high-quality development strategy, takes "scientific decision-making" as the premise, "technology leadership, lean management, and integration of industrialization and industrialization" as the support, and focuses on "market expansion, technological innovation, quality improvement and team building" to build the company. Become a "world-class leading enterprise in the field of gear transmission that respects others and is respected by others."