Core Points - China Eastern Airlines has upgraded its "Chongqing-Shanghai Fast Line" service, increasing the total number of daily flights to 14 and reducing the check-in cut-off time to 30 minutes before departure, enhancing the travel experience for passengers [1][4] Group 1: Flight Operations - The "Chongqing-Shanghai Fast Line" now operates 14 flights daily, with 10 flights to Shanghai Hongqiao and 4 flights to Shanghai Pudong, improving frequency and flexibility for travelers [1][4] - The new schedule includes specific flight numbers such as MU5422, MU5426, MU9196, and others, all connecting Chongqing Jiangbei to Shanghai [2] Group 2: Service Enhancements - The check-in cut-off time has been reduced from 40 minutes to 30 minutes, providing greater flexibility for time-sensitive business travelers [4] - All domestic "Fast Line" flights operated by wide-body aircraft now offer free basic Wi-Fi service, allowing passengers to work, shop, or entertain themselves during the flight [4] Group 3: Aircraft Utilization - China Eastern Airlines is the global launch customer for the domestically produced C919 aircraft and operates the largest fleet of C919s worldwide, with specific flights on the "Chongqing-Shanghai Fast Line" planned to be operated by this aircraft [5]