We've Already Gone to Space, Why Are We Still Using Cold Weapons?

Ye Lingyun woke up from the hibernation cabin and found that he was in a completely unfamiliar world. Here, mechanical civilization has developed to an unprecedented level, biogenetic technology has transformed Superman, and even the "dark matter" in the void has been developed to a level that can be used by humans. But... Why are you invading, ah, no, you are developing colonies and still using cold weapons!