Twelve chests of dried tangerine peel at the river pier are about to be loaded onto a ship, but face the risk of moisture damage due to a leaking chest opening. A young female artisan insists on inspecting the goods before negotiating the price, teams up with her companion to investigate the cause of the sealing failure, repairs it with hemp strips and tung oil paper, and repeatedly tests for water resistance. Faced with shipping deadline pressures and low-price competition, she refuses to compromise cargo quality, leaving three moisture-affected chests for re-inspection while delivering nine qualified chests as contracted. Everyone calculates the repair materials, wages, and freight separately and clearly, winning the shipper's trust. The tiny twelve chests reflect the great business principle of never cheating customers or falsely reporting, and that fair pricing and down-to-earth work lead to lasting reputation.