Three hundred years later, in 2324, AI matured and served all mankind. The story takes place in the Pacific Federation's Xinjing Special Zone. Quantum neural network covers the world (the human brain can be directly connected to the cloud) Nano repair cabin (30 seconds regeneration of trauma) Anti-gravity suspended city (the city is divided into 108 suspended layers) Memory encoding technology (humans can purchase/delete memories) AI ethics bill (all AI must install moral suppressors)