Xuanquanzhi site: a postal station on the ancient Silk Road

Today marks China's Cultural and Natural Heritage Day! Let’s take a look at the Xuanquanzhi site in Dunhuang, Northwest China’s Gansu province! This world cultural heritage site used to be a big postal station on the ancient Silk Road. It is important to the study of the planning and structure of the postal system of the Han Dynasty (206 BC-AD 220).