Great Qin: Selling Mystery Boxes to the First Emperor

I opened a blind-box shop outside Xianyang, selling just three jars a day. Business was booming, but then all my customers ran off to watch the First Emperor's southern inspection tour. Just as I was worrying, an old carriage stopped at the door. The curtain lifted, and a sallow-faced middle-aged man coughed and handed me a copper coin. "One, please." The System went wild with pop-ups: A person of great destiny detected! Bonus gift: Immortality-Extending Elixir. The attendant beside him looked up, his gaze as cold as a blade. I recognized him: Zhao Gao.