Through a mysterious portal, Chen Jin arrived at this strange place - a post-apocalyptic world where civilization had been destroyed.
Consequently, he found -
A piece of metal scrap
A robot trash collector
A battleground
A city
A ton and more of gold
A copy of high-tech documents
A...
In short, Chen Jin found a planet.
At the rocket launch site, adjacent to the large assembly factory was a mid-sized factory that housed a large calculator device. On the surface of the cabinet where the large machine laid, a signal light repeatedly flashed green.