Contradictions and Optimization Paths of E-Commerce Models in Second-Hand Mobile Phone Transactions from a Circular Economy Perspective

随着智能手机普及率攀升与电子废弃物问题加剧，二手手机交易成为循环经济与可持续发展的重要路径。本文基于政策支持与市场现状，聚焦电子商务平台中二手手机交易的C2C、B2C及伪C2C模式，剖析其结构性矛盾：C2C模式因非标准化与信息不对称导致信任风险；B2C模式以服务质量换取价格优势，与消费者性价比诉求存在冲突；伪C2C模式催生“柠檬市场”效应，加剧市场劣化。针对上述问题，提出“模式融合 + 技术治理 + 准入制度”的优化路径，包括推广第三方验机的B2C2B模式、防范生成式AI滥用风险、建立职业商家准入机制。研究为完善二手交易平台治理、提升循环经济效率提供理论与实践参考。With the increasing popularity of smartphones and the growing problem of electronic waste, second-hand mobile phone transactions have become a critical pathway for advancing the circular economy and sustainable development. Based on policy support and market dynamics, this study focuses on the structural contradictions inherent in three e-commerce models for second-hand mobile phone transactions—C2C, B2C, and pseudo-C2C. Specifically, the C2C model faces trust risks due to non-standardization and information asymmetry; the B2C model sacrifices price advantages for service quality, conflicting with consumers’ cost-effectiveness demands; and the pseudo-C2C model exacerbates market deterioration by inducing a “market for lemons” effect. To address these issues, this paper proposes a three-dimensional optimization framework integrating “model fusion, technological governance, and access mechanisms”, including promoting a B2C2B model with third-party device inspection, mitigating risks of generative AI abuse, and establishing professional merchant. The research provides theoretical and practical insights for improving governance of second-hand transaction platforms and enhancing the efficiency of the circular economy.