Petro-king Oilfield Technology Ltd.

International Industry Category: Scientific research and technical services

International Industry Major Class: Research and experimental development

International Industry Middle Class: Engineering and technology research and experimental development

International Industry Sub Class: Engineering and technology research and experimental development

General business items are： oil、 natural gas、 Research and development of shale gas engineering equipment、 Technical Consulting、 Equipment maintenance、 lease、 wholesale、 Commission Agent（ Auction not included）、 Import and export and related supporting businesses（ Does not involve state-owned trade management commodities， Involved quotas、 Commodities subject to license management and other special regulations， Apply in accordance with relevant national regulations）。 Business Training（ No education or training、 Vocational skills training and other training that requires a license）。 Oil and gas technical services； Sales of special equipment for oil drilling；Specialty chemical product manufacturing（ No hazardous chemicals）。（ Except for projects that require approval according to law， Carry out business activities independently in accordance with the law with a business license），The licensed business items are： oil、 natural gas、 Shale gas exploration and development drilling、 Underground operations and engineering construction（ If construction requires relevant qualifications， Can apply as required）。 Oilfield chemicals（ No hazardous chemicals）。（ Projects that require approval according to law， Business activities can only be carried out after approval from relevant departments， The specific business projects are subject to the approval documents or licenses of relevant departments.）

Chinese Industry Category: Petroleum and Petrochemical

Chinese Industry Major Class: Oil and gas extraction

Chinese Industry Middle Class: Oil and gas production support activities

Chinese Industry Sub Class: Oilfield Services