Undoubtedly, judging from the performance of the angel army at that time, Zhou Tian and his group's safety was at least secured for a short period. Given the circumstances, if that group of angels didn't have other tactics, it would have been even more difficult for Zhou Tian and his group to protect themselves in that situation.
Although Zhou Tian hadn't known beforehand that those angels had such abilities, once he discovered that the angels hadn't detected their presence, he realized clearly that with the protection of the angels' abilities, they could be considered safe.
Of course, it's assumed that those angels wouldn't easily give up, so it's estimated that they might take further actions. Based on the angels' influence in this world, even if Zhou Tian and his companions hid themselves well, the opponents surely have the ability to force them out if they decided to search.
