the catering license is valid for 3 years. Temporary catering service activities, catering service license is valid for no more than 6 months. If the catering service provider needs to extend the catering service license, it shall submit a written application for extension to the original issuing department 31 days before the expiration of the catering service license. If the extension application is filed within the time limit, it shall be handled in accordance with the newly applied catering service license.