Group 1 - The Civil Aviation Administration of China has announced a ban on carrying power banks without 3C certification, unclear 3C markings, or recalled models on domestic flights starting from June 28 [1][2] - Jinan Airport has set up 30 promotional signs and posters to inform travelers about the new regulations regarding power banks [2][5] - Qingdao Airport has also implemented the same ban and provided guidance on identifying the 3C certification on power banks [5][7] Group 2 - In the railway sector, power banks must have clear markings and a single rated energy not exceeding 100Wh to be allowed on trains, with additional restrictions on recalled products [8][9] - Travelers are advised to check the specifications of their power banks, as 100Wh is approximately equivalent to 27027mAh at a common voltage of 3.7V [8] - Other electrical items such as electric scooters and batteries exceeding 100Wh are prohibited from being carried on trains, while certain appliances can be carried but not used on board [9]