Group 1 - A recent incident on the Xianyu platform involved users offering "seat reservation" services on Shanghai Metro lines for a fee of 1.99 yuan, which has sparked widespread discussion [1] - Xianyu's customer service has acknowledged the situation and stated that it will be reported to relevant departments for investigation [1] Group 2 - Xianyu, as a leading second-hand trading platform in China, transitioned from a free model to charging a 1% service fee for high-frequency sellers in 2023, with plans to expand this to all sellers at a 0.6% fee starting September 2024 [4] - The platform has faced controversies that have affected user trust, including a data security breach involving a user operations manager who was dismissed for violating company policies [4] - Refund disputes have arisen, such as a case where a user complained about the platform's unclear stance on refund policies for unused movie tickets [4] Group 3 - A significant controversy arose regarding the use of Xianyu coins after a feature upgrade in April 2025, which changed the rules for how sellers receive payments, leading to confusion and dissatisfaction among sellers [5] - The platform's rapid commercialization has not been matched by its governance capabilities, leading to issues such as the recent "seat reservation" service and previous concerns over hidden services and disputes [6] - The transition from a non-profit model to one with revenue targets has increased operational costs for sellers, highlighting the need for a better balance between platform growth, seller rights, and buyer experience [6]