Legal analysis: It is not allowed to open a restaurant for trial operation without relevant business certificates, and business without a license belongs to unlicensed operation.

Legal basis: Measures for Investigating and Banning Unlicensed Business Article 5 If an operator fails to obtain a license to engage in business activities according to law, it shall be investigated and dealt with by the department stipulated by laws, regulations and the State Council decisions; Laws, regulations and the State Council decisions are not specified or unclear, and 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.