Ping'an Ye de Emeng (平安夜的噩梦; Píng'ān Yè de Èmèng), or simply known as Emeng (噩梦), is a Chinese video editor from the Xicheng district of Beijing, China.
Four participants playtest a virtual reality game that is still under development. The game uses AI simulated NPCs and system dynamics to generate a world with features not created by the developers, and perhaps beyond human understanding.