烽火信笺——永不磨灭的信仰

Group 1 - The core message emphasizes the enduring spirit of heroes and their sacrifices for the nation, highlighting the importance of remembering and honoring their legacy [12] - The letters and messages from the past serve as a reminder of the struggles faced during wartime and the resilience of the nation [12] - The emotional connection between mothers and their children is portrayed, with a focus on the sacrifices made for the greater good [2][3] Group 2 - The historical context of the Northeast Anti-Japanese United Army is referenced, showcasing their innovative methods of communication during warfare [5] - The passage of time is acknowledged, with a reflection on how the spirit of heroes remains relevant and inspiring for future generations [12] - The letters symbolize a continuous thread of national identity and collective memory, reinforcing the idea that heroes never truly fade away [12]