Photo introduction: The exhibition displays more than 5,000 precious historical relics and photos from the 14 years from the "September 18th Incident" in 1931 to the victory of the Anti-Japanese War in 1945, featuring major events and important historical figures. Mainly related relics and manuscripts, some of which have become orphans. The collection contains thousands of important documents, books, journals, and archives from the Anti-Japanese War period.