Introduction to the Bonan Ancient Road: The total length of the Bonan Ancient Road is about 4,000 kilometers. In the Han Dynasty, it was called the "Shu Shendu Road". Shu is Sichuan, and Shendu is the ancient name of India. It starts from Sichuan and passes through Trade routes from Yunnan, Burma to India. Bonan is the name of the county that has been used since the 1st century AD, and its administrative seat is in today's Yongping County.
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