The Apocalypse Stole My Girlfriend's Sachet, So I Copied Trillions of Supplies

Before the apocalypse arrived, I awakened the "Supplies Duplication" System, but there was one condition: I had to "steal" my first item from someone else. I set my sights on my rich, beautiful girlfriend, Jiang Wanning. She was cold and haughty, never once deigning to look at me, yet she happily took everything I did for her. When the zombie horde broke out, I entered her heavily guarded villa under the pretense of protecting her. Amid the chaos, I "stole" an utterly ordinary-looking sachet hanging by her door. [Ding! Successfully duplicated the "Ancient Shennong Space"! The supplies inside the space have been automatically bound!] I froze. This unremarkable