I Rely on Historical Fragments to Live Broadcast the Anti-Japanese War

In 2025, I originally wanted to be a historical anchor, but I discovered an amazing secret while sorting out my great-grandfather's belongings. Those yellowed diaries contain top-secret information about the Japanese army from eighty years ago. When I read out the intelligence content live, mysterious viewers suddenly flooded into the live broadcast room: "What you are reading is the undecrypted combat code of our army." What's even more frightening is that as I continue to dig deeper, I discover the shocking plan hidden behind Grandpa's sacrifice...