Upstairs.
Despite returning to the room, Gu Mang had no intention of sleeping. She took out her black backpack from the cabinet and tipped the contents out on the bed before searching through the pile of mess and picking up a mechanical watch.
It was the only thing that her parents had left behind for her. It had an emergency button and a thermosensory function and could also extract key information.
After giving it some thought, she picked up the rectangular metal box as well and walked over to the coffee table where she sat down on the carpet and turned on the table lamp. She then took out the tools from the box and carefully disassembled the dial of the mechanical watch with them.
As the parts were all really tiny, she took her time disassembling them lest they get damaged. Thus, it took her over two minutes before she finally removed the back cover.