Father Qin's Iron Fist

After the great destruction, humans hid underground to survive, and control of the surface fell into the hands of aliens, beasts and species. Darkness is rampant and light is extinguished. Until, a human from three thousand years ago woke up in a dormant cabin... Qin Wu came to this era, adapted to this era, and finally, in his own way, held up the only light in this darkness for the people he cared about.