Legal analysis: the crime of suspected illegal business operation refers to the crime of committing one of the following illegal business operations in violation of state regulations. (a) without permission, dealing in franchise, monopoly goods or other commodities with restricted trading as stipulated by laws and administrative regulations; (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 competent departments of the state, illegally engaged in securities, futures, insurance business or illegally engaged in fund settlement business; (four) engaged in other illegal business activities, disrupting the market order, and the circumstances are serious. Whether it is illegal to buy or sell illegally exploited river sand depends on the business amount: 1, the illegal business amount of individuals is more than 50 thousand yuan, and the illegal business amount of units is more than150 thousand yuan; 2, the amount of illegal income of individuals is more than twenty thousand yuan, and the amount of illegal income of units is more than fifty thousand yuan.

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, disrupting market order, and if the circumstances are serious, shall be sentenced to fixed-term imprisonment of not more than five years or criminal detention, and shall also, or shall only, be fined not less than one time but not more than five times the illegal income; If the circumstances are especially serious, he shall be sentenced to fixed-term imprisonment of not less than five years, and shall also be fined not less than one time but not more than five times the illegal income or confiscated property:

(a) operating franchise, special business projects or other restricted business projects as stipulated 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;

(3) illegally engaging in securities, futures or insurance business without the approval of the relevant competent department of the state;

(four) other illegal business activities that seriously disrupt the order of the city.