Meng Yu's work agreement with the Immortal Sect specified two things very clearly.
First, Meng Yu had both decision-making and veto powers.
Decision-making power meant his strategies and command directions must be followed. The veto power allowed him to reject any actions and proposals.
Second, Meng Yu was granted the authority to command the execution of anyone, including Mirror Twelve and the Golden Core cultivators.
Such terms were not exaggerated, as a military commander should have such powers.
Thus, after arriving in the Cultivation World, Meng Yu decided on future strategies.
He borrowed troops from the Immortal Sect, took over Sleepless City, and wiped out most of the Eternal Night Palace. At this point, there were many favorable strategies, including sweeping across the Western Wastes for maximum gain and carving out a prominent reputation.
However, Meng Yu chose a conservative strategy.
He decided to set up a Teleportation Array.