Core Insights - The Shanghai Municipal Market Supervision Administration conducted a quality inspection of non-medical masks, revealing that out of 30 batches tested, only 1 batch was found to be non-compliant [1][2]. Group 1: Inspection Results - The inspection covered products from seven provinces and cities, with 13 batches from Shanghai and 17 batches from other regions; only 1 non-compliant batch was identified from Shanghai [2]. - The non-compliant product was a "3D mask" from Shanghai Haiying Hygiene Products Co., which failed on filtration efficiency and protective effect [2]. Group 2: Compliance and Standards - The inspection was conducted according to the SHSSXZ0001-2025 guidelines for non-medical mask quality supervision in Shanghai [2]. - All non-compliant products have been reported to the respective local market supervision departments for further action [2].