2. 1 km. According to Baidu map, Xi 'an Cisco Education takes 20 minutes from Datang City, the city that never sleeps, to 2. 1 km, passing through 3 sites. Datang City that Never Sleeps is located at the foot of Big Wild Goose Pagoda in Yanta District, Xi City, Shaanxi Province. It starts from the South Square of Big Wild Goose Pagoda in the north, ends at the ruins of the Tang City Wall in the south, ends at Ci 'en East Road in the east and ends at Ci 'en West Road in the west.