There is such a world, and there is a physical law that even an intelligent civilization in the Stone Age can use "spaceships" made of stone and wood to fly to the sky. Therefore, many outrageous races began to go to heaven and enjoy the abundant resources.
However, in such an absurd world. There are some civilizations that have not discovered this outrageous physical law, so they are trapped in their home star and have developed into the atomic age.
However, some are even more outrageous, with the home star being directly enveloped by a thin film. Not only is the possibility of going to the sky eliminated, but even the possibility of the continued development of basic particles in physics is affected by the thin film in the sky.
As a civilization, they have accepted despair. However, a stupid civilization that was still in the feudal dynasty drove their small wooden boat to break the cage and released the giant beast inside.
Purpose: Expand new writing style