Set up a Street Stall at the Beginning, and You Even Sell Nuclear Bombs?

"I have diamond pills, invisible water, forget-me-not grass..." "Don't miss it if you pass by" "My stall has a full range of varieties and everything~" Jiang Kai was shouting at the street stall, when a man wearing a peaked cap came up and asked, "Do you sell nuclear warheads?" Jiang Kai nodded slightly and replied: "As you said, I sell everything, including nuclear warheads." As the things Jiang Kai sells at the street stall become more and more rare, the business becomes more and more popular...