Introduction to Yuncao Old Street: In the early Ming Dynasty, Zhu Yuanzhang designated Yuncao as the "Twelve Wei Salt Yin'an", which was the salt industry center in the north of the Yangtze River, where Huizhou merchants came in droves; in the late Qing Dynasty, Li Hongzhang moved Zhenjiang Rice Market to Wuhu, Yuncao Town, as an important distribution center for the national rice market in the north of the Yangtze River, has rapidly expanded in scale, eventually forming a situation where "merchants converge and become the first town north of the Yangtze River".