At the beginning, the protagonist's soul passes through the fake eunuch, facing the dual crisis of being executed and serving the empress. Use the system to make perfume and skin care products, successfully gain the trust of the empress, and save your life and the secret of the "fake eunuch". In the mid-term, as a servant of the empress, he established his own intelligence network and small factory in the harem, used modern knowledge to solve the palace poisoning case, eliminated political opponents for the empress, and secretly accumulated strength. In the climax, the protagonist develops cross-era weapons such as black powder and strong crossbows to help the empress consolidate her imperial power amid internal and external troubles and completely overthrow the old aristocratic forces headed by the prime minister. In the end, he became a powerful "Nine Thousand Years Old Man". The empress created a harem for him, and he, as the behind-the-scenes emperor, started Daxia's industrial revolution and the road to global hegemony.
