买年货当心！冒充知名商超配送员兜售劣质海鲜，上海警方抓13 人

Core Viewpoint - The article highlights a case of fraud involving counterfeit seafood sales in Shanghai, where criminals impersonated supermarket delivery personnel to sell substandard seafood products at discounted prices, particularly targeting vulnerable consumers like the elderly [1][2][3]. Group 1: Fraudulent Activities - Criminals posed as delivery personnel from well-known supermarkets, creating a false impression of legitimacy by using branded clothing and marketing tactics such as "supermarket tail goods" and "half-price sales" [2][3]. - The operation involved selling low-quality seafood, with consumers discovering that the products were spoiled after purchase, leading to significant consumer complaints [1][2]. Group 2: Law Enforcement Response - The Shanghai police quickly responded to consumer reports, leading to the arrest of 13 suspects and the seizure of 7 vehicles and a cold storage facility containing approximately 4,000 kilograms of substandard seafood [3][4]. - The investigation revealed a black market supply chain where low-quality seafood was purchased from other provinces and sold at inflated prices, with profit margins exceeding three times the cost [3]. Group 3: Consumer Warnings - Authorities have issued warnings to consumers, especially the elderly, to be cautious of street vendors claiming to offer "supermarket tail goods" or "internal discounts," emphasizing the importance of purchasing from reputable sources [4]. - The police are committed to enforcing strict food safety regulations as the Chinese New Year approaches, aiming to protect public health and safety [4].