Relationship between Li Xuan and Illya.
After hearing this, Li Xuan immediately handed some equipment to Noah and explained that some of these equipment were for position detection, and some were for communication camps or headquarters.
Because this is a secret zone or is on a different plane than the earth, communication with ordinary mobile phones cannot be used at all. This also prompted scientists on Earth to jointly develop a device that can conduct short-term communications on the front line.
After decades of popularization, every soldier now has one.
In addition, Li Xuan also handed Noah a crystal ball and said: "This crystal ball have contains 50% of my strength. Whenever there is danger, just throw it at it, and then run away desperately."
Noah also took away the crystal ball. After all, this is not the earth, and the enemy will not kill you just because you are a genius. And as long as they know that there are geniuses from Earth on the front line, they may desperately kill them.