I Open a Canteen, and You Ask Me If I Sell Two-Way Foil?

Lin Mai traveled to a parallel world, where the Xia Kingdom was the enemy of the world. He runs a canteen that sells everything. As long as he sells items, he can get funds to buy more advanced items, but he also needs money to buy himself. So he started live streaming to make money. One day during the live broadcast, a barrage fan asked if he could get arms. Lin Mai thought it was a joke and agreed without hesitation. Unexpectedly, fans directly asked for a hundred AK-47s... Since then, customers have become more and more abstract. "Boss Lin, do you have Dongfeng-41 intercontinental nuclear missile?" "Boss Lin, are you selling the J-20 stealth fighter?" "How much does the Mark85 steel armor cost?" "You have one too, Dangerous Wanderer?!" Lin Mai met all the customer's requirements, thinking that there would be no customer more outrageous than this. Until one day. A man claiming to be from the General Administration of Strategy came to the door. "Hello, do you have the two-way foil?"