In order to make it convenient for his subordinates to enter and exit this island from all over the world, the Count Blood should have set up many teleportation arrays all over the island.
This saved Yang Yu the trouble of carefully selecting locations one by one.
After all, this is Count Blood's territory; they must know each teleport location and passage better than Yang Yu.
If Yang Yu and his companions really wanted to figure out the location of every passage and teleport point, it would definitely take them a lot of time, and there's no guarantee that Count Blood wouldn't establish new routes of action.
So there's no need to spend too much time choosing escape locations, as long as it basically allows for a quick departure to sea.
Near the area where Yang Yu and his team are located, there happens to be a vast sea, so Yang Yu decided to establish a teleport location here.
