Li Yan, a modern social animal, traveled through time and became a minor official in the Xianyang Prefecture of the Qin Dynasty. As soon as he took office, he encountered a mess in the grain depot's inventory.
He used double-entry accounting to sort out the mess, and built a simple waterwheel to alleviate the drought, which unexpectedly attracted the attention of the First Emperor.
From then on, he relied on his military ingenuity to build firearms, modify warships, and fight back from the grassroots level to lead the Qin army across Europe, Asia, and Africa, and finally allowed Qin to dominate the world!
