Xi' an food and drug administration window. I need to bring my ID card to handle the catering service license in Xi 'an Port Area and go to the window of Xi 'an Food and Drug Administration. The catering service license refers to the business license of the catering industry in China. According to the Food Safety Law, which came into effect on June 1, 2119, the catering service license was officially launched in China on June 1, replacing the food hygiene license that has been used for decades.