Legal analysis: the state implements a licensing system for refined oil business. The refined oil mentioned here includes gasoline, kerosene, diesel oil and other alternative fuels that meet the national product quality standards and have the same purpose, such as ethanol gasoline and biodiesel. So as long as you have a license and business license, you can buy and sell diesel. Otherwise, it is illegal not only to buy and sell diesel, but also to buy and sell gasoline, kerosene and other fuels. If the number of transactions is large, it will also be suspected of illegal business operations.

Legal basis: Article 225 of the Criminal Law of People's Republic of China (PRC), in violation of state regulations, commits one of the following illegal business operations and disrupts market order. If the circumstances are serious, he shall be sentenced to fixed-term imprisonment of not more than five years or criminal detention, and shall also be fined not less than one time but not more than five times his illegal income. If the circumstances are especially serious, a fine of not less than one time but not more than five times the illegal income shall be imposed or property shall be confiscated: (1) dealing in franchised or monopolized commodities or other commodities whose trading is restricted by laws and administrative regulations without permission; (2) buying and selling import and export licenses, import and export certificates of origin and other business licenses or approval documents stipulated by laws and administrative regulations; (three) without the approval of the relevant state departments, illegally engaged in securities, futures, insurance business, or illegally engaged in fund payment and settlement business; (4) engaging in other illegal business activities that seriously disrupt the market order.