I Open a Small Store and Sell Some Black Technology. What's Wrong?

Traveling through parallel time and space, Lin Yan got a family property canteen! The profit of the canteen was so poor that Lin Yan decided to change the sales products! On the first day of re-launch, the medical cabin is on the shelves! Show everyone the rebirth of a severed limb on the spot! The whole network was shocked! The country came to your door overnight! The second broadcast is launched, and defense bracelets are on the shelves! The transparent light shield flashes, and the safety value is maximized! The military can't sit still! The third broadcast is on the shelves... After a series of blows, Yingjiang was frightened to death: You don't respect martial ethics, but your technology is hundreds of years ahead of us! Long Guo shook his head silently: These are just products from the canteen, why are you panicking? Later, Lin Yan invented another invention..., Which is about to usher in a new era! Looking at the Dragon Kingdom entering the super era, Taika began to doubt life... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.