Official website introduced that Shandong Provincial People's Government, the quantitative grade is the evaluation of food safety management of catering service providers by market supervision departments. It is divided into three grades: excellent, good and qualified, which are represented by three cartoon images: laughing, smiling and flat face. Quantitative classification and grade publicity management adhere to the principles of scientific supervision, administration according to law, comprehensive coverage, quantitative rating, dynamic supervision, openness and transparency, fairness and justice, and encouraging progress.