The fifth major category on the exchange list is — Skru Star's advanced technology;
The Holy Silver civilization is a magic-oriented civilization, not very deep in technological research.
But this "not very deep" is relative to other civilizations of the same level, and if you compare Blue Star and Skru Star, the gap is as vast as that between the heavens and the earth!
Su Yu opened the list and briefly skimmed through it, only to find he didn't understand any of the technological terms within.
"What is 'Sky Orbit Track'?"
"What about 'Green Wind Material Generator'?"
"Gamma Ray Burst Utilization System"…
He couldn't make heads or tails of any of these things.
The last major category on the exchange list, which is the sixth, is — Holy Silver Civilization's large-scale weapons.
Among these large-scale weapons, there are both technological side large weapons (like the "Fission Ray Generator" that Su Yu spotted at a glance… no, wrong, immediately noticed) and magical side ones.