Legal analysis: it is definitely illegal to open a clinic without a business license, and the case-handling department has the right to detain people.

Legal basis: measures for investigating unlicensed operation.

Fifth operators who have not obtained the license to engage in business activities according to law shall be investigated and dealt with by the departments stipulated by laws, regulations and the State Council decisions; Where laws, regulations and the State Council decisions are not specified or unclear, the departments determined by the people's governments of provinces, autonomous regions and municipalities directly under the Central Government shall investigate and deal with them.

Article 7 Where an operator engages in business activities without obtaining a license and business license according to law, it shall be investigated and dealt with in accordance with the provisions of Article 5 of these Measures.