Cnooc (hereinafter referred to as "cnooc") is an extra-large state-owned enterprise (central enterprise) directly under the state-owned assets supervision and administration commission of the state council of China. Headquartered in Beijing, cnooc has 98,750 employees and four upstream subsidiaries in tianjin, zhanjiang, Shanghai and shenzhen. China national offshore oil corporation ranked 79th in fortune magazine's 2014 world top 500 companies list. [1] ranked 27th in the 2015 top 500 Chinese brands list sponsored by China brand value research institute. Since it was founded in 1982, China's cnooc through successful implementation of the reform and restructuring, capital operation, overseas mergers and acquisitions, the integration of upstream and downstream of the important measures, such as the enterprise to achieve the leap development of the comprehensive competitive power, maintain the good development momentum, by a simple engaged in upstream oil and gas company, develop into a prominent main business, complete industrial chain of international energy companies, formed the oil and gas exploration and development, professional and technical services, sale of refining and chemical fertilizer, gas and power generation, financial services, new energy and so on six big business sector.

China's cnooc outline around the "second crossing" development, the company seize the new trend in the development of offshore oil industry, new opportunities, to face the new problems in the development of company, the new challenge, prudent management and realize the "twelfth five-year" good start, for efforts to promote China's offshore oil industry "secondary across" have created favorable conditions.

In August 2016, cnooc ranked 22nd among the top 500 Chinese enterprises in 2016. On July 12, 2017, China national offshore oil corporation (cnooc) was rated A by the state assets supervision and administration commission (sasac) in 2016 annual business performance assessment. [4] ranked 87th on the 2018 fortune global 500 list. [5] on October 11, 2018, Forbes released the 2018 world's best employers list, and cnooc ranked the 6th.