Legal analysis: Under any of the following circumstances, those who engage in other illegal business activities are "serious" and are sentenced to fixed-term imprisonment of not more than five years or criminal detention, and concurrently or exclusively fined not less than one time but not more than five times the illegal income:

The amount of personal illegal business is more than 50,000 yuan but less than 500,000 yuan, or the amount of illegal income is more than 6,543.8+0,000 yuan but less than 6,543.8+0,000 yuan;

The illegal business amount of the unit is more than 500,000 yuan but less than 2.5 million yuan, or the amount of illegal income 10 yuan is more than 500,000 yuan;

Legal basis: Article 225 of the Criminal Law of People's Republic of China (PRC) has two levels of sentencing for the crime of illegal business operation: if the circumstances are serious, he shall be sentenced to fixed-term imprisonment of not more than five years or criminal detention, and shall 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 his illegal income or his property shall be confiscated.