Crude oil import: at present, automatic quota is needed, which belongs to approval, and three oil drums need to be handled. It is difficult for such trading companies to operate without entities, and they need to be well connected with storage and transportation.
Refined oil can be carried out through general trade, because it involves dangerous goods, and some relevant approvals are needed when declaring the business scope. Get a business license, or get a power of attorney from a petrochemical enterprise.