Lin Zhou, a special soldier, acted bravely and accidentally traveled to the Yong Dynasty and became a poor scholar living in Bianjing City. Facing the dilemma of freezing and hungry, he relied on modern knowledge and special forces fighting skills to survive in desperate situations: he used soap formula to earn his first pot of gold, improved glass mirrors became popular among the rich and powerful, and used technologies such as plant ash fertilization and water truck irrigation to increase farmland output, and counterattacked from a refugee to a wealthy "Shopkeeper Lin".
When Duan Wang Xiao Che was assassinated, Lin Zhou turned the tide of the battle with a special forces raid and became the prince's confidant ever since. Not only did he assist Xiao Che in organizing a caravan to open up the north-south trade route, but he also set up an ambush on the Black Rock Ridge when escorting grain and grass. He used lime jars and improved crossbows to defeat bandits. His legend of retreating from the enemy alone shocked the government and the public. He was awarded the title of Butokuro and entered the court. With the establishment of glass workshops and the Ordnance Improvement Bureau, Lin Zhou's influence spread from the market to the frontiers - the new guards he trained adopted modern tactics, and the repeating crossbows he developed frightened the Beidi cavalry.
Above the court, Lin Zhou used "soap economics" to leverage the reform of the Ministry of Household Affairs, but was impeached by a group of civil servants. In the rivers and lakes, a mysterious mountain bandit leader threatened revenge, and even Beidi Xiazuo infiltrated into Bianjing City to plot evil. And between him and Su Qingwan, the daughter of the official minister, Liu Ruyan, a descendant of the Mohist family who is proficient in organ skills, and Ayina, the princess of Beidi who disguises herself as a man, an emotional entanglement that spans the grievances of family and country quietly unfolds.
From a refugee in a ruined temple to the powerful Duke Dingguo, Lin Zhou used twenty pieces of soap to knock on the door of wealth and rewrote the fate of the dynasty with a piece of improvement drawings. When he stood on the dragon steps of the Hall of Supreme Harmony, he looked down at the Jinluan Hall where hundreds of civil and military officials were kneeling.
