Core Points - Eastern Airlines has upgraded its "Air Express" service on 37 domestic routes, enhancing passenger experience with free basic "in-flight Wi-Fi" on selected wide-body aircraft [1][4] - The upgraded routes include major connections such as Shanghai Hongqiao to Beijing Capital, Guangzhou, Shenzhen, and Kunming to Beijing Daxing [3][4] - The basic "in-flight Wi-Fi" allows passengers to maintain instant communication, browse the web, and use office software, while also offering paid upgrades for higher bandwidth options [5][6] Service Enhancement - The upgrade of the "Air Express" service is part of Eastern Airlines' initiative to improve service quality and expand the coverage of free "in-flight Wi-Fi" [4][8] - Previously, free standard "in-flight Wi-Fi" was available only for first-class and business-class passengers on wide-body aircraft [4] - The airline aims to create a more intelligent and convenient travel ecosystem for passengers by continuously optimizing the "in-flight Wi-Fi" service experience [8]