Zhaobi introduction: Qing soldiers entered the customs, and then brought business into the customs. First, they set up an account in Taigu and radiated to the whole country. During the Daoguang and Xianfeng years, it reached its peak. There were more than 640 Cao's shops in the north and south of the Yangtze River, with assets as high as 12 million silver and 37,000 employees. Therefore, the villagers had a saying: "Wherever a sparrow flies, there is a Cao's business name." ” statement. Later, it went abroad, reaching Japan in the east, Moscow in the north, and Paris and London in the west. It exported domestic tea and cloth abroad and introduced Japanese steel, Korean ginseng, and Russian metal products. The Cao family created a "Tea Road" between Shanxi and Mongolia, which is comparable to the "Silk Road" in history. It is a pity that after the Sino-Japanese War of Guangxu and the Gengzi Year, wars, business competition, and the arrogance and extravagance of descendants led to failure, and finally completed its glorious journey.