China Marine Bunker（PetroChina）Co.Ltd. (abbreviated as CHIMBUSCO), formerly known as China Marine Bunker Supply Company, was established in 1972 with the approval of the State Council. On December 26, 2003, the company was restructured into a limited liability company, with the shareholders of China Ocean Shipping Group Co., Ltd and Petro China.

CHIMBUSCO has more than 30 branch offices located in major ports of China, including: Dalian, Qinhuangdao, Caofeidian, Tianjin, Yantai,Qingdao, Rizhao, Lianyungang, Shanghai, Ningbo, Zhoushan, Xiamen, Shenzhen, Guangzhou, Zhuhai, Zhanjiang,  Fangcheng, Jiangyin, Nangtong and Nanjing.  In addition, CHIMBUSCO has professional overseas companies and offices in Hong Kong, Singapore, South Korea, Netherlands and USA.CHIMBUSCO owns nearly 70 barges of various types, 12 oil depots with a total storage capacity of 1.45 million cubic meters, as well as well-equipped oil terminals and train loading and unloading lines, providing all-round services for ship owners, charterers, investors and equipment manufacturers all over the world.

CHIMBUSCO  is dedicated to supply fuel oil, lubricants, LNG and fresh water for domestic and international ships. At the same time engaged in the fuel oil trade, oil transportation and storage; To carry out the storage, supply, sale and transportation of all kinds of oil products; Process lubricants with supplied materials. In the process of business development, CHIMBUSCO has established long-term, stable and extensive relations and cooperation with major shipping companies, oil companies and port enterprises in the world, and has established a good reputation in the shipping industry and the oil industry.

CHIMBUSCO head office successfully established the comprehensive management system with ISO9000 as the framework, occupational safety and health and environmental protection as the content in 2002, and successfully passed the third-party certification of ISO9001 quality management, ISO14000 environmental management and OHSAS18000 occupational safety and health management system of CCS in October 2002. In May 2014, based on quality management system, environmental management system, occupational health and safety management system and HSE management system, CHIMBUSCO fully integrated ‘The Central Enterprise Comprehensive Risk Management Guideline’, ‘The Enterprise Internal Control Basic Norms ‘  and other regulatory requirements, adhere to the principle of " risk as the guidance, the process as the link, control as the means, the system to protect ", compiled ‘CHIMBUSCO Risk Management System Documents ‘and formally enacted the comprehensive risk management system. Blend in a variety of management standard and management standard integration in a process and system, It is a set of enterprise management and control mode covering all management fields of an enterprise, achieving management requirements with standards in advance, control in process, evaluation afterwards and continuous improvement.