Gene Player of the Apocalypse

Pan Jun, a 21-year-old bookworm, was brought to the earth in the parallel universe by the gene fusion system, which also brought evolutionary particles. This starry sky was still the same as the earth, but the earth was not the earth he was familiar with. Pan Jun walked further and further in this apocalyptic world, standing in the starry sky and watching this neutron star, which had a good mass and fused to the shield, could increase the density a lot. (The protagonist has a dark personality and is somewhat out of touch with the place and reality. If you don't like it, don't criticize it)