In the Ming period, marriage was considered solemn and according to the law written in The Ming Code (Da Ming Lü), all commoners' marriages must follow the rules written in Duke Wen's Family Rules (Wen Gong Jia Li). The rules stated that "in order to arrange a marriage, an agent must come and deliver messages between the two families." A marriage broker had the license to play important roles by arranging marriages between two families. Sometimes both families were influential and wealthy and the matchmaker bonded the two families into powerful households. Studies have shown that, "In the Ming and Qing dynasties, a number of noble families emerged in Jiaxing of Zhejiang, where marriage is the most important way to expand their clan strength." Hence, marriage brokers were crucial during the Ming era, which offered us an insight of the lives of the Ming commoners.