三大航：中日航线免费退改签延至明年3月28日

Group 1 - The core viewpoint is that major Chinese airlines, including Air China, China Eastern Airlines, and China Southern Airlines, have announced special handling for tickets related to flights to and from Japan, allowing free cancellations and changes for travel until March 28, 2026 [1] - Prior to this announcement, the free cancellation and change policy was set to end on December 31, 2025 [2]