C1 Energy Ltd, or C1, is a subsidiary enterprise solely invested by CBI (Shanghai) Co., Ltd., the largest integrated service provider in Chinese commodity markets. C1 Energy is the sole brand of CBI China's oil & gas business.

C1 Energy, founded in May 2000, is the first independent and professional market reporter and pricing agency on petroleum market. C1 Energy has initiated a brand-new mode for analyzing, reporting and pricing in petroleum market, persistently providing first-hand, professional and credible market information and trading benchmark. Wide recognition from OPEC, various multinational petroleum groups, and international financial organizations, numerous domestic and overseas readers in over 30 countries, render C1 one of the major sources for domestic petroleum market intelligence, and the best one recognized by international petroleum market as well. C1 Energy has already ascended to the first brand for China's energy market intelligence service.

CBI (China) CO., Ltd merged with C1 Energy Limited on December, 2007. New joint venture enhance C1 Energy's strength on market coverage, information products and creativity ability, through the combination of strong business foundation, market development ability and industry platform from CBI, thus helping C1 provide its clients with broader contents and more services, and lay a solid foundation for becoming the price benchmark in China's oil and gas market.