Group 1 - The core observation is that Sam's Club has established a stronger presence in the Chinese market compared to Costco, with Sam's Club's membership model becoming a significant part of the new middle-class consumer's shopping habits [2][3] - Sam's Club has been operating in China for 30 years and has surpassed 60 stores as of early 2026, supported by a mature "instant delivery" system that ensures popular products like Swiss rolls and roasted chicken are widely available in first- and second-tier cities [4] - In contrast, Costco has only been in the Chinese market for 7 years and has not achieved the same level of market penetration or brand recognition as Sam's Club [4]

Core Viewpoint - Recent consumer complaints about a rodent found in a product from Sam's Club highlight ongoing challenges in the membership store sector, emphasizing the need for improved supply chain management and consumer safety measures [1][5][6] Group 1: Consumer Perception and Membership Model - Initially, the membership fee model for stores like Sam's Club was not well accepted by Chinese consumers, making it difficult for these stores to expand in the market [1][2] - Over time, the rise of the middle-income population has led to increased acceptance of membership stores, driven by the appeal of exclusive products and high cost-performance ratios [2][3] Group 2: Competition and Product Differentiation - Membership stores face intense competition as more retailers enter the market, leading to a homogenization of popular products, which diminishes the uniqueness of offerings [2][3] - The pressure to develop market-leading products is significant, as competitors can quickly replicate successful items, creating challenges for established brands [3][6] Group 3: Supply Chain and Logistics Challenges - The recent incident involving a rodent in a product underscores the critical importance of logistics and supply chain management in maintaining product safety and consumer trust [5][6] - Membership stores must ensure that all aspects of the supply chain, from sourcing to delivery, are secure and efficient to prevent safety issues that could harm brand reputation [5][6] Group 4: Future Outlook for Membership Stores - The membership store model has potential for growth, but it requires continuous innovation in product offerings and a focus on safety in e-commerce logistics to meet rising consumer expectations [6]