Based on the strength of the Vermilion Bird, even if Zhou Tian has already unified the current continent, he still has no hope of winning against the bird. After all, the continent Zhou Tian resides in, albeit large, is not one of the main continents in this world. Without sufficient territory to support, Zhou Tian is far from being a top-tier monster at this point.
Thus, Zhou Tian temporarily let go of those NPCs, as for now, he was more interested in the progress of the craftsmen under his command.
Zhou Tian has already unified the continent he resides on. Therefore, if Zhou Tian wishes to continue growing, he needs to gain territory from other areas to support this growth. Given the circumstances of the world at that time, Zhou Tian could only construct sea ships for outward expansion.
