Emperor Xiaozong of the Ming Dynasty-Zhu Shitang In the long feudal society, it was common for a man to have three wives and four concubines, which was allowed by the old ethical system and protected by national laws. As the emperor of the Ninth Five-Year Plan, it is even more unusual, with 3,000 harems. But Zhu Youtang was the only emperor in China who practiced monogamy. He only married a queen Zhang in his life, and he didn't accept maids, nobles or beautiful women. Living with the queen every day and living as a husband and wife like ordinary people is really an alternative to the emperor industry.