Shen Qitang, the concubine of a Yangzhou salt merchant, was forced to marry the deposed prince Lu Zhi on behalf of her eldest sister. Everyone in the capital laughed at her for marrying a lunatic who was waiting for death, but she silently managed the dilapidated palace with abacus and made the business in Jiangnan flourish. When the new emperor ascended the throne and liquidated the old party, Lu Zhi suddenly took off his disguise and held her abacus hand: "Madam has made enough money, are you willing to make a fortune with me?"
