"Travel expenses, interstellar map," Qin Yu thought to himself.
As for the travel expenses to the Demon World, Qin Yu wasn't worried at all— he still had plenty of Primordial Spirit Stones. Besides, if really necessary, he could sell a few Upper Grade Immortal Artifacts; after all, he acquired quite a few treasures back in the Ni Yang Realm.
The most important thing now was the interstellar map.
Moreover, according to what his disciple said, interstellar maps are extremely rare and valuable.
"Ah, Master, there is one more thing that's very important," Liu Hanshu suddenly exclaimed as if he had remembered something.
"Speak," Qin Yu said, looking at his disciple.
Liu Hanshu hurriedly said, "Master, I once heard that interstellar maps are not omnipotent. For example, a planet indicated on the map might have a transmission array leading to somewhere else. But by the time Master arrives there, that transmission array might be destroyed."
Qin Yu's heart was jolted.