Long Wen, a modern female engineer who traveled through time due to an engineering accident, woke up and became a useless princess who was exiled in disguise from the Dayin Dynasty. The predecessor fell out of favor due to his mother's crime, and was sent to the northernmost part of the empire, called "Beihuang County" where the fiefdom was actually a desperate situation. In times of despair, the "civilization infrastructure system" is activated, quantifying abstract concepts such as people's support, productivity, and technological development into points and tasks. Facing the hungry refugees, the eyeing local powerful, and the political opponents in the court who want to kill her, Long Wen has no choice. She used the system to exchange cement formulas to strengthen the city walls, summon agricultural talents to improve crops, and organized refugees to build water conservancy projects in exchange for work relief. She started from brick to brick and built Beihuang from a hell on earth to a pearl beyond the Great Wall. However, prosperity has led to deeper jealousy and greed. The Yan Song Group accused her of recruiting private troops and plotting evil intentions, and the barbarians were instigated by them to invade on a large scale. Long Wen had to walk a tightrope between developing people's livelihood and armed self-defense. Can she, with the help of the system, not only hold on to the home she built with her own hands, but also spread advanced production methods and institutional concepts like sparks, and finally shake the foundation of that decadent dynasty? This is a huge gamble about survival, construction and change.