Core Viewpoint - The Civil Aviation Administration of China (CAAC) has issued a notice prohibiting passengers from carrying power banks without 3C certification, unclear 3C markings, or recalled models on domestic flights starting June 28 [1][2]. Group 1: Implementation of Regulations - Different airports are implementing the CAAC's notice with varying degrees of strictness, with some airports beginning checks on power banks as early as June 27 [2]. - At Shanghai Hongqiao Airport, staff emphasized the need for 3C certification on power banks during security checks, and clear signage was present to inform passengers [1][2]. Group 2: Handling of Confiscated Power Banks - Confiscated power banks can be temporarily stored at designated areas in the airport, but cannot be shipped back home due to courier restrictions [4]. - Shenzhen Airport offers a free storage service for power banks for up to 7 days, after which they are considered abandoned [4]. Group 3: Comparison with International Standards - Internationally, few airports check for 3C or CE markings on power banks during security, with many not requiring the removal of power banks or laptops from luggage [6]. - Prior to the CAAC's notice, power banks with unclear energy ratings were already prohibited from being carried on flights, and those exceeding 100Wh required airline approval [6].