After pondering for a while, Han Xiao made his choice.
"I want the PE-0 Nano-Synthetic Fiber."
"Wow, that's smart. I thought a warrior like you, who likes to battle, would go for the Bulletproof Membrane instead."
"To create something, I will need sufficient PE-0."
"Alright." Lei Zhenyu nodded. He felt that out of the four weapons, PE-0 Nano-Synthetic Fiber was the most valuable one as this new material could be used for many more weapons. He realized that Han Xiao was indeed a skillful mechanic with keen eyes.
As they confirmed the exchange, Han Xiao returned to his truck and began creating a new Ghost sniper rifle. With the help of the blueprint, everything went well.
I've earned so much from this exchange!