If they could have taken White Tiger City, the several lords would have already teleported themselves into the city by now. Since they have not done that, it is clear that even they understand that they cannot take White Tiger City at this point. As such, to avoid loss on their side, those lords would not let Zhou Tian and his team continue fighting in White Tiger City. As long as those lords had such an idea, there would naturally be a way to teleport out Zhou Tian and the other surviving monsters. After all, this mission is primarily to weaken the strength of the NPCs, not to damage the strength of themselves. If they are not sure to send out Zhou Tian and the other survivors, then sending so many elites at once but all ended up on the opponent's territory, such a thing would surely be a loss for the monster side.