Toughness and comfort, can they be harmoniously integrated in concrete? Returning the focus to people, the “H” chair reshapes the stiff image of concrete building materials from a contemporary perspective. The chair back and the sitting surface form a special included angle, which meets the ergonomic principle, so that it can better fit the hips and waist and bring a comfortable experience to users. The cement parts are integrally grouted with ultra-high strength concrete, which does not need to be polished again, so that every detail of the product can maintain high texture and reduce the waste of economic cost of secondary processing.