Core Viewpoint - The article emphasizes the importance of remembering the Nanjing Massacre and the ongoing efforts to preserve historical evidence and honor the victims through national memorials and the release of archival materials [1][8][14]. Group 1: National Memorial and Historical Remembrance - The national memorial ceremony for the victims of the Nanjing Massacre was held on December 13, 2025, marking the 12th anniversary of the event [1]. - During the ceremony, a moment of silence was observed, and various activities were conducted to honor the victims, including air raid sirens and car honking in Nanjing [1][3]. - The number of living survivors of the Nanjing Massacre has dwindled to only 24, highlighting the urgency of preserving their stories and the historical truth [3]. Group 2: Historical Artifacts and Evidence - A recent exhibition at the Nanjing Massacre Memorial Museum showcased newly discovered artifacts, including letters from Japanese soldiers and photographs from the occupation, which serve as evidence of the atrocities committed [3][5]. - One notable artifact is a letter from a Japanese soldier that describes the brutal killings in Nanjing, providing a chilling perspective on the events [5]. - The museum has seen a significant increase in donations of historical materials, with a 30% rise compared to previous years, indicating a growing commitment to preserving history [6]. Group 3: Archival Materials and Historical Truth - Newly declassified Soviet documents related to the Japanese Unit 731's war crimes were released, adding to the historical record of Japan's wartime atrocities [8][10]. - The documents include testimonies from war criminals that detail inhumane experiments conducted by Unit 731, reinforcing the narrative of organized and systematic war crimes [12][14]. - The release of these documents serves to counteract historical revisionism and affirm the reality of the atrocities committed during the war [6][14].