Ten Years After the End of the World, the Second Time Traveler

[True science fiction, no obscenity, no nonsense] [After the end of the world, rebuild a solar system] An unknown cosmic miner accidentally traveled to Hongmeng Star. This is already the 10th year after the end of the world. Big trees make flour, space printing, exoskeletons, brain-computer chips, mutants, mechas... Let's see how he goes from the end of the world to the reconstruction of the solar system step by step...