The three largest Chinese oil and gas companies continue to implement joint projects with Russia and finance Russia's strategic industry by paying significant taxes. The National Agency on Corruption Prevention (NACP) has added China National Offshore Oil Corporation (CNOOC Group), China Petrochemical Corporation (Sinopec Group), and China National Petroleum Corporation (CNPC) to the list of international sponsors of war.
- CNOOC Group is the third largest national oil company in China after CNPC and Sinopec. It is the largest offshore oil and gas producer in China.
- Sinopec Group is China's second-largest state-owned company, engaged in fossil fuel production and specializing in crude oil refining.
- China National Petroleum Corporation is China's largest national oil and gas corporation and one of the world's largest oil and gas production companies.