Yun Qingyue and the others took another three days to deliver the battle plan to the Main Brain, and along the way, they exchanged back the smart IDs for Huahua's family of three.
The Main Brain and Tianxing were completely dumbfounded as they looked at the handwritten paper battle plan. Tianxing exclaimed, "I have lived for over eight hundred years, and it seems I have never seen such a document!"
The Main Brain added, "According to my records, ever since humanity began drifting into the interstellar era a century ago, paper documents have become extinct!" Neither of them dared to pick up the battle plan, only observing it with extreme caution.
Chapter 271