"... Such a high wall is quite common in Pan Zhu City. Falling Stars and Battle Union have also built such a high wall. There are fearsome zombies inside. It's said that there are mutant zombies in the innermost part of the forbidden zone. Falling Stars and Battle Union always throw their prisoners over the wall. I had come here once, and I could hear screams…" Yang Tianzhao explained.
Actually, he just knew part of the truth. At first, the three forces, Falling Stars, Battle Union and Huyang People's Front, had been involved in building the high wall. After paying a hefty price, most of the zombies in the urban area of Pan Zhu City had been surrounded by the high walls. Some of the secrets in the forbidden zone may only be known by the senior leaders of the three forces.