Casa Hill is a three-layer house designed for the client's family of three generations. Inside the space, smooth curves overlap and interweave as the metaphor of the magnificence of mountains, the winding of clouds as well as the tender of river, outlining the implicit Chinese artistic conception. In the meanwhile, the curved structure integrates different spatial components, the wall, ceiling, storage, display area, etc., so as to make the most of storey height. Therefore, thanks to the curves, different parts and rooms are visually connected as a whole as if the space has been extended.