The Great Wall of China stretches from Lop Lake to Dandong.
 In addition, Qin, Han and earlier Great Wall sites are 3,080 km (1,914 mi) long in total; Jin dynasty (11151234) border fortifications are 4,010 km (2,492 mi) in length; the remainder date back to Northern Wei, Northern Qi, Sui, Tang, the Five Dynasties, Song, Liao and Xixia
 Several walls were built from as early as the 7th century BC, with selective stretches later joined by Qin Shi Huang (220206 BC), the first emperor of China

