Xi 'an 928 runs every 12- 18 minutes, and the first and last buses from the terminal are at 05: 30- 19: 30. Xi 'an, formerly known as Chang 'an and Haojing, is a prefecture-level city under the jurisdiction of Shaanxi Province. It is the capital of Shaanxi Province, a sub-provincial city, a megacity, a national central city, xi 'an metropolitan area and the core city of Guanzhong Plain urban agglomeration. It is an important central city in western China and an important national scientific research, education and industrial base approved by the State Council. Xi is the best tourist destination in China and one of the cities with the most international image in China. There are two heritages listed in the World Heritage List, namely, the Mausoleum of Qin Shihuang and Terracotta Warriors, the Big Wild Goose Pagoda, the Little Wild Goose Pagoda, the Daming Palace Site in Chang 'an in Tang Dynasty, the Weiyang Palace Site in Chang 'an in Han Dynasty and the Xingjiao Temple Tower.