Mecha War: I Predict the Future and Build the Strongest Mecha

Ji Yunfei, the last non-host saint of mankind, Ji Yunfei, a master of both alchemy and formation, with a holy rank of 3791, fell in the apocalypse and was reborn as a boy! This is a strange world that has experienced three mass extinctions, and civilization has regressed back to ancient society, but it still retains modern technologies such as cars, refrigerators, and mechas. Everyone practices spiritual energy, the strong can reach for the stars and the moon, and can even control the giant steel beast - mecha! Relying on his past life memories and the [Origin Mecha Information Database], Ji Yunfei has insight into the future and masters endless knowledge. Grandpa Grandpa is seriously injured, the family is in turmoil, and he is about to be expelled from the center of power? The beast tide is watching with eager eyes. Is the crisis of genocide imminent? It doesn't matter, in this life, I, Ji Yunfei, am back! What? Uncle Zhong, the housekeeper who watched me grow up, Lao Ma, the driver, Uncle Shi, the janitor... Are they all hidden heaven-level bosses? !