三大航司：中日航线免费退改签延长至明年3月28日

Group 1 - Major airlines in China, including Air China, China Eastern Airlines, and China Southern Airlines, have announced special handling for tickets related to flights to and from Japan [1] - The free cancellation and change policy for flights involving Japan is applicable for travel until March 28, 2026 [1] - The previous policy for free cancellation and changes was set to expire on December 31, 2025 [1]