Xi'an is the capital of Shanxi province in China and a
sub-provincial city.As one of the most important cities in Chinese
history,Xi'an is one of the Four Great Ancient Capitals of China for it
has been the capital of 13 dynasties,including the Zhou,Qin,Han,and the
Tang.Xi'an is also renowned for being the eastern terminus of the Silk
Road and for the location of the Terracotta Army from Qin Dynasty.The
city has more than 3,100 years of history.It was called Chang'an in
ancient times.
Since 1990s,as part of the economic revival of
interior China,especially the central and northwest regions,in addition
to a history of manufacturing and solid industrial establishments,Xi'an
has become an important cultural,industrial and educational center of
the central-northwest region,with facilities for research and
development,national security and China's space exploration program.
拓展资料：
西安，古称长安、镐京，是陕西省会、副省级市、关中平原城市群核心城市、丝绸之路起点城市、“一带一路”核心区、中国西部地区重要的中心城市，国家重要的科研、教育、工业基地[1-5] 。西安是中国四大古都之一[6] ，联合国科教文组织于1981年确定的“世界历史名城”[1] ，美媒评选的世界十大古都之一[7] 。地处关中平原中部，北濒渭河，南依秦岭，八水润长安。下辖11区2县并代管西咸新区，总面积10752平方公里，2017年末户籍人口905.68万[8-12] 。
西安是中华文明和中华民族重要发祥地。长安自古帝王都，其先后有西周、秦、西汉、新莽、东汉、西晋、前赵、前秦、后秦、西魏、北周、隋、唐13个王朝在此建都。丰镐都城、秦阿房宫、兵马俑，汉未央宫、长乐宫，隋大兴城，唐大明宫、兴庆宫等勾勒出“长安情结”[13] 。
西安是中国最佳旅游目的地、中国国际形象最佳城市之一[14-15] ，有两项六处遗产被列入《世界遗产名录》，分别是：秦始皇陵及兵马俑、大雁塔、小雁塔、唐长安城大明宫遗址、汉长安城未央宫遗址、兴教寺塔。[16] 另有西安城墙、钟鼓楼、华清池、终南山、大唐芙蓉园、陕西历史博物馆、碑林等景点。西安也是国家重要的科教中心，拥有西安交通大学、西北工业大学、西安电子科技大学等7所“双一流”建设高校[17] 。
2018年2月，国家发展和改革委员会、住房和城乡建设部发布《关中平原城市群发展规划》支持西安建设国家中心城市、国际性综合交通枢纽、建成具有历史文化特色的国际化大都市
参考资料：百度百科_西安
During the Tang Dynasty (618-907), Xi'an was the largest city in the world. Chang'an, was linked to many central Asian regions and Europe via the Silk Road, with thousands of foreign traders living the city.
Xi'an is the capital of Shaanxi Province and also the political, economic and cultural center of the Northwest China. With the development of travel industry and the implementation of the open policy, it has become one of the nation's key tourist cities and tourism has become the mainstay in Shaanxi's economy.
Xi'an lies at longitude 103? east by latitude 34?north, and 412 meters above sea level. It has an average annual temperature of 13癈, and an average annual precipitation of 604 mm. The rainy season comes in July, August and September. The city now has under its jurisdiction eight districts -- Xincheng, Beilin, Lianhu, Yanta, Weiyang, Baqiao, Lintong and Yangling, and five counties -- Chang'an, Lantian, Huxian, Zhouzhi and Gaoling. As a whole, Xi'an covers an area of 9,983 square kilometers and has population of 5,860,000. The city proper occupies an area 861 square kilometers, and reaches a population of 2,650,000.
With an elevation of 500 metres, the Weihe Plain extends between Baoji in the west and Tongguan in the east and borders the Qinling Mountains in the south and the Huangtu Plateau in the north. Lying in the warm zone, the plain has a temperate climate with four distinct seasons. Chequered with the Weihe, Jinghe, Luohe, and Bahe rivers as well as the Jinghui, Weihui and Luohui canals, the fertile land on the plain has easy access to irrigation facilities and an abundant yield of farm produce. Xi'an lies in the centre to the south of this plain, a favourable geographical location surrounded by water and hills.
The area around Xi'an was inhabited by the progenitors of the Chinese nation as far back as 500,000-600,000 years ago. In the 1960s, archaeologists discovered in Lantian County to the southeast of Xi'an human fossils and cultural relics belonging to the Paleolithic Period. In the 1950s, the remains from the Neolithic Period were discovered at Banpo Village to the east of Xi'an City. In the 70s, the Jiangzhai Ruins from a later part of the Neolithic period were discovered at Lintong County to the northeast of Xi'an City. These archaeological discoveries indicate that the area around Xi'an is one of the cradles of Chinese civilization.
As one of the six ancient capitals in China, Xi'an served as the seat of 12 imperial capitals for 1,120 years after Chinese society had entered the civilized stage.
Xi'an is also a world-famous tourist city, a treasure house of cultural relics. The remains of past civilizations furnish evidence of every major epoch in China's half a million history, making for a particularly illustrative textbook of Chinese culture. The history apparent in Xi'an is so ancient and continuous that the city has no parallel anywhere as a cultural site. Here one can visit the sites once inhabited by its primitive people; admire the bronze wares manufactured in the Bronze Age; wander through the city ruins of the Qin, Han, Sui and Tang Dynasties; imagine for oneself the clamour of the old Oriental metropolis; explore the imperial tombs of the Qin, Han and Tang Dynasties, testimony to the pervasive power of the feudal ruling class; ramble in temples and pagoda courtyards, tracing vestiges of the Silk Road; and study stone inscriptions to appreciate Chinese calligraphy. Not least, Xi'an is the site of excavation of the vast army of terracotta warriors and horses from the tomb of China's First Emperor, Qin Shihuang, from whom the country derives its name.
Xi'an was the starting point of the world-famous Silk Road. It can be well likened to a history museum. Moving around this old city is like going through thousands of years back in time. In this vast museum you will see the Banpo Village Remains of a matriarchal community; the Huaqing Hot Springs which was noted as early as the Zhou Dynasty more than 3,000 years back; Qin Shihuang's terra-cotta warriors and horses, known as the eighth wonder of the world; the imperial cemetery grounds of the Han and Tang dynasties; the Great Mosque with unique features; the Big Wild Goose Pagoda and the Small Wild Goose Pagoda built in the Tang Dynasty; the Bell Tower and the Drum Tower of the Ming Dynasty; and the Forest of Steles with a rich collection of age-old stone steles.本回答被提问者采纳