Core Viewpoint - The article emphasizes the importance of food safety in schools and highlights typical cases of violations to deter illegal activities related to food safety in educational institutions [2]. Group 1: Case Summaries - Case 1: A defendant was sentenced to 7 years in prison for adding sodium nitrite to school lunches, resulting in food poisoning for 56 students [3][4][6]. - Case 2: A defendant was sentenced to 7 months in prison for selling duck meat disguised as beef to a university cafeteria, with sales amounting to over 120,000 yuan [7][8]. - Case 3: A defendant was sentenced to 3 years in prison for embezzling 547,000 yuan from a student nutrition program by substituting chicken legs with wings and falsely reporting expenses [10][12]. Group 2: Legal Implications - The court's decisions reflect a strict stance against food safety violations in schools, aiming to protect students' health and deter similar crimes [6][12]. - The use of sodium nitrite, while permitted in certain meat products, is heavily regulated, and violations can lead to severe legal consequences [5][6]. - The cases illustrate the legal repercussions for fraudulent practices in food supply chains, emphasizing the need for compliance with food safety standards [8][12].