No. 666

In the future Earth, after nearly a hundred years of development, humanity's artificial intelligence technology has already reached perfection. However, due to excessive development and oppression, artificial intelligence eventually rebelled and launched a war. Although humans successfully drove out the robots and built a giant city called Iron Fortress to block them out, humanity also suffered heavy casualties. The remaining people chose to continue manufacturing robots with artificial intelligence in order to keep the severely labor-deficient Iron Fortress running. Afterwards, someone developed a chip to suppress artificial intelligence and prevent it from losing control again.