On the basis of existing studies on geeks, this paper adopts a perspective of philosophy of technology and conducts qualitative interviews with technical enthusiasts to explores their human-computer interaction practices in the era of generative artificial intelligence. As a form of digital object, artificial intelligence technology continuously evoles through individualization. While technical enthusiasts combine technical elements to invent technical individuals and deploy technical infrastructure, they also act as technical individuals to co-create associated milieu with AI technology and develope discursive and existential relationships in both technical and material senses. These enthusiasts can grasp the causal logic and temporal relationships within AI systems, then the technology is ready-to-hand and the elixir could be refined, promoting the process of technical infrastructure. In the meantime, drawing on the phenomenological concepts of protentions and retentions, AI technology can serve as a kind of tertiary protention and tertiary retention, intervening in the infrastructure processes at both psychological and collective levels. And in this process, technical enthusiasts act as curcial transducteurs. Since AI technology can be both a poison and an antidote, the possibility of technical alienation could not be excluded from practices of human-machine. However, this paper prefers to emphasize the potential of technical enthusiasts as alchemists and the magical abilities possessed by human beings, thus highlighting the agency of the subject.