Li Changan traveled through the Tang Dynasty and became the lowest-level bad commander in Chang'an City. I have no money, no power, and I am bullied by my immediate boss. At the critical moment, the "Datang Sign-in System" was activated. From then on, he solved crimes, opened factories, and advanced technology, all the way to counterattack. Li Linfu wants to punish him? Slap in the face! Is An Lushan going to rebel? Detonate in advance and fight head-on! When the rebels came to the city, everyone thought he was going to run away, but Li Changan showed off gunpowder and a hot-air balloon...
