Arriving at the Scripture Hall, Su Yuan first went to find the array map for the Guard Post Barrier.
After a quick look, he saw that the Guard Post Barrier required just a Third-level Barrier Master's basic skills, and its "Large" Specialization only needed to be at the third level.
As Su Yuan's "Large" Specialization had long since reached the fourth level, setting up this barrier wasn't difficult.
After putting away the array map, Su Yuan thought for a moment and, according to his previous plan, borrowed the remaining volumes behind the "Heavenly Strategy Formation Map."
"I don't know how long this trip to the New Dust Realm will take. According to my plan, these should provide enough knowledge to advance to the fifth level. Moreover, the Large and Transmute Specializations should also be able to reach the fifth level."
Even barrier masters of the same level might specialize in different types of array barriers due to their research focuses.
