This project is an ideal model of "home + office". The setback becomes the best view point of the whole house, but also an "ambiguous" space that is compatible with various functions. The designer has positioned it as a space for "useless use", which is obviously a high level of resting body and mind and even philosophical sublimation for the setback outside the space itself. The city evolution will transform from the straightforward to the metaphorical, to the quest for diversity—an aggregation of blurred boundaries that evolves from a human perspective. The future city is an intricate place and its habitation will be organically integrated into this diversity. The setback is as solid as a cave. Without a clear function, it is in a state of inaction, and people is free to choose how to use it. The boundary between inside and outside is redefined and blurred, inspiring one to rethink the relationship with the city and with the nature. The design hopes to provide a sense of isolation from the city dwelling. Teking the infinite lake view and the distant mountains as a reference, the design extends from the interior to the outdoor setback, where the interior and exterior environments blend together to form an order that extends from the near to the far side of oneself.