Watching Sera begin to get busy, Du You left only the Hell Blood Demon Dog for protection, then he and the two sisters wandered around elsewhere. They needed to eliminate all the remaining enemies.
This base is so massive that Du You would never believe it if anyone said there were no remaining people.
They might be able to deceive others, able to deceive various instruments, but under the spiritual perception of Du You and the two others, it's absolutely impossible to hide.
As these people were being identified one by one, the hidden threats within the base were gradually being eradicated.
As for the scenario where someone would activate a suicide system destroying everything, that has already become impossible for Du You.
On the other hand, Sera had already connected with the Command Center. This was their first contact with Command Center after establishing their base. Of course, not the temporary base, but using their special privilege, they directly contacted Colonel Hade.