Legal analysis: According to Article 21 of the Measures for the Administration of Catering Service License, the following materials shall be provided when applying for the extension of the Catering Service License:

1. Application for the extension of the Catering Service License;

2. A copy of the original Catering Service License;

3. Explanations that the business premises, layout process, sanitary facilities and other contents of the original Catering Service License have changed or not;

4. Other materials specified by the food and drug supervision and administration departments of provinces, autonomous regions and municipalities directly under the Central Government.

Legal basis: Measures for the Administration of Catering Service License

Article 19 Where a catering service provider needs to renew the Catering Service License, it shall submit a written application for renewal to the original issuing department 31 days before the expiration of the validity period of the Catering Service License. If the application for extension is filed within the time limit, it shall be handled in accordance with the newly applied "Catering Service License".

Article 21 An application for renewal of the Catering Service License shall provide the following materials:

(1) an application for renewal of the Catering Service License;

(2) A copy of the original Catering Service License;

(3) Explanations that the business premises, layout process, sanitary facilities, etc. of the original Catering Service License have changed or not;

(4) other materials prescribed by the food and drug supervision and administration departments of provinces, autonomous regions and municipalities directly under the central government.