Introduction to the cultural relic protection monument: The founder of the Cao family, Cao Bangyan, was a native of Huata Village, Jinci, Taiyuan. He made a living selling casseroles. During the Hongwu period of the Ming Dynasty, his family moved to Beigu Village, Taigu, where he also farmed. In the 14th generation of the "three" generation, there was a man named Cao Sanxi who went to Guandong alone to do business and made a lot of profits. At that time, the so-called "Seven Halls Outside Guanwai" all had the Cao family's business name.
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