Thanks to the strict defense layer upon layer of the Ten Thousand Stars Tower, and the fact that the Establishment King Qing Qi probably never thought he would die, or that he would be killed by a Martial Artist at the Third Stage of the Vein Forging Realm, he didn't send out any warning talisman during the fight.
By the time he wanted to send it, it was already too late.
So, until Ye Zhen secretly slipped out of the treasure vault of the Stars Tower, not a single person in the tower realized that something major had happened in the treasure vault.
Of course, this was related to how short the time Ye Zhen used for the heist was. From beginning to end, from entering the vault passage to finishing the battle with the Establishment King Qing Qi and then emptying the treasure vault, it didn't even take half a quarter-hour.
After robbing the treasure vault of the Stars Tower, Ye Zhen's plan for today was not yet complete; it was only halfway done.