Title: Great Wall of China
Content: such. The 493 "Book of Song" quotes the frontier general Tan Daoji referring to "the long wall of 10,000 miles", closer to the modern name, but the name rarely features in pre-modern times otherwise. The traditional Chinese mile (, "lǐ") was an often irregular distance that was intended to show the length of a standard village and varied with terrain but was usually standardized at distances around a third of an English mile (540 m). Since China's metrication in 1930, it has been exactly equivalent to , which would make the wall's name describe a distance of . However, this

Title: History of the Great Wall of China
Content: Bishop Juan González de Mendoza (15501620) reported a wall five hundred leagues long, but suggested that only one hundred leagues were man-made, with the rest natural rock formations. The Jesuit priest Matteo Ricci (15521610) mentioned the Great Wall once in his diary, noting the existence of "a tremendous wall four hundred and five miles long" that formed part of the northern defences of the Ming Empire. Europeans first witnessed the Great Wall in the early 1600s. Perhaps the first recorded instance of a European actually entering China via the Great Wall came in 1605, when the Portuguese Jesuit brother Bento

Title: Great Wall of Qi
Content: total length has been estimated at about 600 kilometers. Most of the wall is still able to be seen. Great Wall of Qi The Great Wall of Qi () is the oldest existing Great Wall in China. Construction of the wall started in 685 BC (during the Spring and Autumn period) by the state of Qi, to defend itself against an invasion by the Kingdom of Chu. The existing sections date back to 500 BC. Construction ended during the Warring States period. The wall stretches from the areas under the administration of the present-day city of Jinan to the present-day

Title: Great Wall of China
Content: Beyond Jiumenkou, an offshoot known as the Liaodong Wall continues through Liaoning province and terminates at the Hushan Great Wall, in the city of Dandong near the North Korean border. In 2009, 180 km of previously unknown sections of the wall concealed by hills, trenches and rivers were discovered with the help of infrared range finders and GPS devices. In March and April 2015 nine sections with a total length of more than , believed to be part of the Great Wall, were discovered along the border of Ningxia autonomous region and Gansu province. Before the use of bricks, the

Title: History of the Great Wall of China
Content: Qingshuiying (清水營) in northeastern Shaanxi, a total of more than 2000 "li" (about ) long. Along its length were 800 strong points, sentry posts, beacon-fire towers, and assorted defences. 40,000 men were enlisted for this effort, which was completed in several months at a cost of over one million silver taels. This defence system proved its initial worth in 1482, when a large group of Mongol raiders were trapped within the double lines of fortifications and suffered a defeat by the Ming generals. This was seen as a vindication of Yu Zijun's strategy of wall-building by the people of the

Question: Is the Great Wall of China 650, 1,450 or 2,050 miles long?
Answer: 1,450