Mecha**

AD 2100. The First World War between humans and machines ends. The two sides signed the armistice agreement "Destroying God Contract" in Tiandu, New World. From then on, humans lived in the old world, while machines lived in the new world, forming a pattern in which the old and new worlds coexisted. 22Nd century. The earth has once again entered a rare era of peace. The price paid by mankind is that the population has dropped sharply from the original 20 billion to 3 billion. Lost complete control of the machine. The freedom to study theology was lost. Lost the power to form a government or state. He even lost his dominance over the world. They can only survive in the old world with backward technology and become the research object and hunting ground of the new world. Each abandoned city has a unified name, called the Old World. Above every ruined city in the old world, there will be a new city in the new world suspended above for supervision. The huge new cities are like huge sky curtains, completely blocking the progress of human civilization. Human science can be said to have completely come to an end. Completely reduced to a slave of the machine, lingering in a dark corner. …