Group 1 - The core point of the article is the introduction of a new boarding policy by China Southern Airlines, allowing passengers to board flights with only 15 minutes before departure, significantly reducing the traditional check-in time requirement [1][3] - This new service, named "Instant Boarding," is a first in the domestic civil aviation industry, breaking the common practice of closing check-in counters 30 to 40 minutes before flight departure [3][5] - The policy aims to provide convenience for travelers with sudden travel needs, such as last-minute changes or frequent business trips, thereby enhancing the overall travel experience [3][5] Group 2 - For passengers with checked luggage, the check-in time remains 30 minutes before departure, with options for luggage delivery services available [5] - The initiative has sparked discussions on social media, with many users expressing support and suggesting that it should be implemented at more airports [5][7] - The civil aviation industry is currently in a recovery phase, with major airlines reporting significant reductions in losses, indicating a competitive environment against other transportation modes like high-speed rail [7][9] Group 3 - Other airports and airlines are also beginning to shorten their check-in times, reflecting a broader industry trend towards improving travel convenience [7][9] - Recent announcements from various airports have indicated a shift in check-in cut-off times, with some reducing it from 40 minutes to as little as 30 minutes before departure [9]