Is Delivery Available? From the Start, I Send the Imperial Jade Seal to the Qin Dynasty

For three years, no one cared about his food deliveries. Then one day, the whole world knew him for cross-dressing. On his way back from a comic convention, Nan Beidong received a package: Wanjieda Branch Office. Delivered Yet? was hiring couriers. Its business spanned countless worlds, sending couriers across different timelines to fulfill customer requests. Good reviews brought rewards by the handful; bad reviews meant deductions from points and bonuses at best, and death at worst. Nan Beidong had been about to swipe past the listing, but after seeing the base salary, he silently signed up. First delivery: transmigrate to the early years of the Qin dynasty and build an atomic bomb at the king's command. Something was off about this Qin dynasty. Daji, Bai Qi, and Shang Yang all stood side by side in court, making it a hodgepodge of history. I thought you were proper history, but you're actually unofficial history. I thought you were unofficial history, but you're really a dog's breakfast. Civil officials and military officers were ranked in nine grades, with the ninth the weakest and the first the strongest. Training one's vital energy could split rocks and level mountains. The Xiongnu to the north were even more ferocious, always ready to invade south. How was a food-delivery guy supposed to meddle in matters of the military and state? Nan Beidong gritted his teeth and got to work. If the customer wanted results, he would plan routes, allocate resources, and deliver at the limit using a courier's methods. He proposed salt-and-iron trade, supply depots, and political marriages through hostage princes. The court called him a madman, but Shang Yang gave him a chance. Bai Qi set his sights on him. Ying Zheng: “My dear subject, what is this?” Nan Beidong: “Your Majesty, this is a handheld device!” Ying Zheng lowered his eyes and pondered. “I know a hen lays eggs that can be eaten, but I never knew a ‘handheld chicken’ could lay anything at all!” After watching a video, the King of Qin suddenly understood. “Now I see! This handheld chicken can lay atomic bombs. What a divine treasure!”