Group 1 - The article discusses a social media post regarding the usage rights of charging ports on high-speed trains, highlighting confusion among passengers about who can use these ports [1] - According to the railway hotline, there is no clear ownership of the charging ports as they are located in different positions, and generally, any passenger can use them [3] - In case of disputes, passengers are advised to seek assistance from train staff, who can help mediate the situation or allocate the charging port to those in need [3] Group 2 - Some passengers suggest that the usage rights should be determined based on the train's running direction, while others believe that public items should be collaboratively used through negotiation [3]