The document discusses the concepts of "interaction" and "fusion" in design. It argues that while interaction design focuses on the connections between individuals, the concept of "fusion design" aims to design for a state of symbiotic harmony where people, products, and environments blend together. The document suggests that Chinese traditional culture, which emphasizes that "you are among us and we are among you", provides a model for fusion design. Fusion design would focus on designing people, not just objects, to create a spirit of "great coordination" between humans and the systems they interact with. The concept of fusion design is just being introduced here without a full framework, but aims to spark discussion.