50 years later,
The world had revolved over half a century, undergoing significant changes.
Fewer than a thousand examinees remained, either succumbing to natural causes or falling victim to the world's aborigines.
Despite being sent into this world as children, surviving for over a century posed a huge challenge.
The calamities that they accumulated in the beginning, erupted killing them before the mission ended.
As for the inhabitants of this world, they had already adapted to the subterranean world.
Now, the new generation only learned about the surface world through history and picture books.
The subterranean world further thrived and became connected.
Shelters had been connected through tunnels, marking a new chapter in their subterranean journey.
...
In the previously Promised Land Shelter, now known as the Promised City, a bustling scene unfolded.
As the city leader and founders, announced their final presence in this world.
"Citizens of the Promised City..."
