Those several white coats were shouting, Han Xiao hadn't heard their language before, but he could understand the meaning. "Experiment", "survival time", "guard" these words made him feel uneasy. Footsteps sounded urgently outside the door, someone was quickly approaching.,"Bang!" Bursting through the door, I was met with a white hallway stretching before me. At either end stood a dozen guards in black tactical gear, their electric batons raised.,The surroundings were dark, and he was alone in the room.。