The core psychological healing device of the future shelter is shaped like a shattered door frame, symbolizing “a hopeful gateway through the ruins.” Its surface features a gradient purple‑red coating that subtly adjusts color temperature in response to emotional fluctuations, while embedded neurofeedback sensors can project virtual natural landscapes or evocative memory scenes. Though it offers no physical passage, it provides survivors with an emotional outlet—within its enclosed space, it serves as a “door” leading to inner peace, silently safeguarding the last bastion of the human spirit.