Claim: Wanquan District has its western and northern borders along the Great Wall, a 13,171 mile long fortification that was built as protection from nomadic groups, with construction starting as early as the seventh century BC.
Evidence: Wanquan (simplified Chinese: 万全区; traditional Chinese: 萬全區; pinyin: Wànquán Qū) is a district of the city of Zhangjiakou, in the northwest of Hebei province, China, located just to the southwest of Zhangjiakou's urban core. Its western and northern borders are defined by the Great Wall, across which it borders Shangyi and Zhangbei counties. 21,196 km (13,171 mi) Fortification Several walls were built from as early as the 7th century BC, with selective stretches later joined together by Qin Shi Huang (220–206 BC), the first emperor of China. The Great Wall of China (traditional Chinese: 萬里長城; simplified Chinese: 万里长城; pinyin: Wànlǐ Chángchéng) is a series of fortifications that were built across the historical northern borders of ancient Chinese states and Imperial China as protection against various nomadic groups from the Eurasian Steppe.