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.,The fourth is the most important, his current situation is very dangerous!,He recognized "Red Serpent" Hela. This was one of the challenge scenarios on Haelan Star - the "Valkyrie Laboratory," a subordinate base of the Sprout Organization.。