| Oilfield Construction Engineering Co.¡ª¡ª |
| Provides integral comprehensive services of equipment maintenance & repair, engineering construction, pipe engineering, products manufacture and port construction. |
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| Oil Production Services Co.¡ª¡ª |
| Operates FPSOs as well as provides services of offshore field operation, maintenance and environmental protection. |
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| Oilfield Technology Services Co.¡ª¡ª |
| Provides complete services of EOR as well as oil production technology R & D and its application. |
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| Supervision & Technology Co.¡ª¡ª |
| Provides offshore operation support and third party supervisory/technical services.
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| Communication & IT Co.¡ª¡ª |
| Provides a variety of shore-offshore communication and IT network services.
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| Human Resources Co.¡ª¡ª |
| Provides complete services of people recruiting, training, certification, skill verification and management. |
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| Marketing Services Co.¡ª¡ª |
| Provides sales coordination and supporting services for upstream and downstream products. |
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| Catering & Support Services Co.¡ª¡ª |
| Provides nutrient, hotel-like catering services. |
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| Petrochemicals & Services Co.¡ª¡ª |
| Engages in operation of branch pipeline, city gas, oil product transportation, by- product reprocessing businesses. |
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| Logistics Co.¡ª¡ª |
| Provides one-stop services of procurement, freight agency, transportation, customs clearance and storage etc. |
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