Deep Space Imperial City

Deep in the vast starry sky, a huge city stands quietly. Where will the collapsed giant city drift away? When the cultivation system and the evolution system come at the same time, how to choose! Jiang Yu was originally an earthling who accidentally traveled to the Polar Planet, but because he was an alien, he could not practice local skills. But by chance, he got a fragment of a giant city and embarked on the path of cultivation and evolution.