Which level does Cao Finance Company belong to?

Department level. According to official website's inquiry, the Beijing Municipal Government and China Aviation Oil Group Corporation are large state-owned air transport service guarantee enterprises established on the basis of the former China Aviation Oil Group Corporation, which belong to the department-level units. It is the largest aviation fuel supplier integrating aviation fuel procurement, transportation, storage, testing, sales and filling in China, an authorized investment institution in the State Council, a pilot enterprise of state holding company, and a central enterprise managed by the State-owned Assets Supervision and Administration Commission of the State Council.