The model, clutched in youthful hands, was once warmed to a scorching temperature by love and longing. Despite its simple craftsmanship and ordinary materials, it was enough to make a child believe that the boundless universe was nothing more than a small sphere in their palm. It depicted a corner of the vast universe for the youth, only to be left behind forever at their childhood bedside. "Later, I ventured into the cosmos, far from home... Through the windows of the Express, my homeland had indeed become a tiny little thing."