Core Viewpoint - The investigation into the abnormal blood lead levels among children at the Keshan Peixin Kindergarten in Tianshui City, Gansu Province, revealed serious food safety violations, including the use of toxic non-food-grade pigments in food preparation, leading to significant health risks for children and staff [1][4][22]. Investigation Findings - A special investigation team was established by the Gansu Provincial Government to address the blood lead issue, involving multiple departments and experts from national agencies [1]. - The investigation uncovered that the kindergarten's chefs purchased non-food-grade pigments online and used them in food preparation, resulting in lead levels in food items far exceeding safety standards [2][3][11]. - Specific lead concentrations found in the food included 1340 mg/kg in corn rolls and 1052 mg/kg in three-color red date cakes, both of which are significantly above the national safety limit of 0.5 mg/kg [2][11]. Environmental Impact Assessment - Environmental assessments around the kindergarten showed no lead contamination in air, water, or soil, indicating that the source of lead exposure was primarily from the food served at the kindergarten [5][6][8]. - The investigation included sampling from nearby areas, including a lead-zinc transfer station, which also showed lead levels within acceptable limits [7][8]. Legal and Regulatory Actions - Six individuals, including the kindergarten's principal and chefs, were arrested for their involvement in the production of toxic food [4][16]. - The investigation revealed systemic failures in oversight by local education and market regulation authorities, leading to multiple disciplinary actions against officials for neglecting their duties [17][18][22]. Health Monitoring and Response - Blood lead testing was conducted for all children and staff at the kindergarten, revealing that 247 out of 251 children had abnormal lead levels [19][21]. - A coordinated medical response was initiated, involving national and provincial health experts to ensure proper treatment and monitoring of affected individuals [20][21]. Future Preventive Measures - The Gansu Provincial Government has committed to enhancing food safety oversight in schools and kindergartens, implementing stricter regulations to prevent similar incidents in the future [22].