Lin Wanzhao, a peasant girl, was selected by the Chu Hou Mansion to be the young lady of his legitimate son Chu Mingyuan because of her good mechanical inventions. After marrying into the Hou family, she faced the difficulties of her mother-in-law, the frame-up of concubines, and the jealousy of her sisters-in-law. She used steam spinning wheels, mechanical locks, steam pumps and other inventions to solve them one by one. At the same time, she helped the Hou Mansion revitalize its industries (steam textiles, steamships, railways), and eventually became the head of the Hou Mansion, winning the respect and happiness of the family.
