I Fished a Cornerstone Out of My Pond, So I Chose to Hand It Over to the State

[Ordovician] [Sea Monsters] [Building and Farming] Gu Ming never imagined that the fishpond he had tended for half his life would yield a nautiloid that should have been extinct for more than 400 million years. Alive. Moving. And vicious. After taking photos, checking its identification, and confirming it again and again, Gu Ming fell silent. There was no way he could handle something like this on his own. So he chose to hand it over to the state. Soon, the fishpond was sealed off, and investigators discovered a mysterious cave at its bottom. Gu Ming and three national security officers entered it, only to transmigrate unexpectedly to the Ordovician, more than 400 million years in the past. There were no forests, cities, or roads. As far as the eye could see, there was only barren land and a primordial ocean teeming with ancient life. Worse still, the passage connecting the two eras had strict limitations. To bring supplies from the modern world, they first had to send back something of roughly equal weight from the Ordovician. And so... Others transmigrate with a System. Gu Ming transmigrates by fishing. Starting with a fishing rod and a tent, he builds up to a fishing crew, cold storage, a dock, and a laboratory, then finally a genuine Ordovician research base. As modern civilization gradually takes root 400 million years in the past, humanity at last ventures into that ancient ocean, until now known only through fossils.