Sun Maocai is greedy and ambitious by nature. Plot: After helping Qiao Zhiyong to develop the Qiao family's business, he was dissatisfied with the status quo and wanted to monopolize the Qiao family's business. He thought that he could do it by marrying Grandma Qiao. However, the failure of the plan led Sun Maocai to betray the Qiao family and spend money to become the prefect of Taiyuan. Qiao Family Courtyard is located in Qiaojiabao Village, Qi County, Shanxi Province. It is also called in the middle hall. It was once a national AAAAA tourist attraction and a national cultural relic protection unit. It is an ancient house with the traditional architectural style of northern Han people. It was first built in 1756, also known as Zai Zhongtang. The owner of the house was Qiao Zhiyong, a famous Shanxi merchant in the late Qing Dynasty who was known as the "Liang Rich Man". The whole courtyard covers an area of ??10,642 square meters and is shaped like a double "xi". It has 6 large courtyards, 20 small courtyards and 313 rooms. In 1985, the Qixian People's Government used the Qiao Family Courtyard site to establish the Qixian Folk Museum, which was opened to the public the following year.