The Huring Country's party was one step ahead of everyone else, though. Almost all of them knew very well what this place was the moment they saw the Yin Corpses. It's not that the Sacred Land went out of its way to tell the Huring Country's disciples regarding the second test. It's just that the case regarding the Soul Eater Sect and the Death Yin Zone was famous in the Sacred Land's territory.
Because of that, many of the Huring Country's disciples, who were also teleported randomly, began to appear near the Soul Eater Sect. By the time other cultivator groups from other countries arrived, the Huring Country was pretty much ready to enter the sect. Well, there were few exceptions, of course. For example, Julian's country knew about this place, so quite a few of his companions had already arrived in the place.
