Don't Answer

I inherited the deep space radio receiving station left by my grandfather, who everyone thought was crazy. Until tonight, I accidentally captured a mysterious signal from Proxima Centauri. After deciphering it, there was only one line: "Deal? Use your 'war' in exchange for our 'knowledge'." I thought it was a prank and casually replied: "How to trade?" An hour later, the launch codes for the global nuclear arsenal appeared on the center screen of the Pentagon, with my personal signature. PS: "The sample has been delivered, please accept it. - Xinghai Merchant" On my computer, the formal contract sent by the other party was flashing. The title was: "Earth Civilization (War Attribute) Acquisition Agreement."