Delivery boy Qi Yan traveled through the Qin Dynasty with undelivered spicy hotpot, and found that his Meituan helmet was regarded as auspicious by Liu Bang. When he used the flashlight of his mobile phone to pretend to be a "palm thunder" and used chili noodles to make "Xianjia Thunderbolt Powder", the entire rebel army went crazy. But as the power bank turned into a prophetic compass, and the take-out receipts revealed the history of the future, he discovered that it was never black technology that changed history, but the bag of braised chicken and rice that was eaten by an army of 300,000 people.