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An undated photo shows the Yucheng Postal Stop located in the Postal Lane outside the South Gate of Gaoyou, a county-level city in Yangzhou, East China's Jiangsu province. It is currently the largest, and most completely preserved, ancient courier station in China, where couriers changed horses and rested. The stop has been listed in the fourth group of National Key Cultural Relics Protection Units since 1996. [Photo provided to chinadaily.com.cn]
