In the message Su Yu sent to Bai Yan, he mentioned a coordinate. Bai Yan had the researchers on Demon Island roughly calculate it, and even at maximum power teleportation, it would take over a month to reach that location.
Considering the urgency of Su Yu's message, taking a month to get there would be too late.
Bai Yan gave an ultimatum to the Research Department on Demon Island: within a week, they must reach the designated target point, or the entire Research Department on Demon Island would face terrifying punishment!
In reality, the Research Department does have a method for ultra-long-distance space transmission, but this method would cause too much damage to Demon Island itself, and it is also an immature technology.
If this technology were indeed used, then even if they reach the coordinates, Demon Island would lose most of its combat strength and might even require major repairs!
