Obtain the Eight-Year War Resistance System in Modern Times

A student who is traveling in Southeast Asia accidentally obtained the eight-year Anti-Japanese War system. Is it necessary to let the system know that the notebook is over? Will the time be corrected? No matter what, let's gather the wool first. How should guns, ammunition, medicine, and food be cashed in now? ! Why did my rush to return home show that I was in enemy-occupied territory, and I had to move around every day for fear of being arrested. It hurts, I'm in the 21st century! !