34°18′30″N 108°51′30″E / 34.30833°N 108.85833°E
Chang'an, located in China's Shaanxi Province, was the capital city of several Chinese dynasties, including the Western Han and the Tang, from 202 BC to AD 907. At various times, it was the largest city in the world. Its name was subsequently changed, and during the Ming dynasty period its modern name of Xi'an was adopted.
Xi'an is the capital of the Chinese province of Shaanxi. A sub-provincial city on the Guanzhong plain, the city is the third-most populous city in Western China after Chongqing and Chengdu, as well as the most populous city in Northwestern China. Its total population was 12.95 million in the 2020 census, including an urban population of 9.28 million.
Xi'an is one of the oldest cities in China. Known as Chang'an throughout much of its history, Xi'an is one of China's Four Great Ancient Capitals, having held the position under several of the most important dynasties in Chinese history, including the Western Zhou, Qin, Western Han, Sui, Northern Zhou and Tang. Xi'an is now the second-most popular tourist destination in China. The city was one of the terminal points on the Silk Road during the ancient and medieval eras, as well as the home of the 3rd-century BC Terracotta Army commissioned by Emperor Qin Shi Huang—both of which are listed as World Heritage Sites by UNESCO.
The Sui dynasty (/swɛɪ/ SWAY) was a Chinese imperial dynasty that ruled from 581 to 618. The re-unification of China proper under the Sui brought the Northern and Southern dynasties era to a close, ending a prolonged period of political division since the War of the Eight Princes. The Sui endeavoured to rebuild the country, re-establishing and reforming many imperial institutions; in so doing, the Sui laid much of the foundation for the subsequent Tang dynasty, who after toppling the Sui would ultimately preside over a new golden age in Chinese history. Often compared to the Qin dynasty (221–206 BC), the Sui likewise unified China after a prolonged period of division, undertook wide-ranging reforms and construction projects to consolidate state power, and collapsed after a brief period.
The dynasty was founded by Yang Jian (Emperor Wen), who had been a member of the military aristocracy that had developed in the northwest during the prolonged period of division. The Sui capital was initially based in Daxing (Chang'an, modern Xi'an), but later moved to Luoyang in 605, which had been re-founded as a planned city. Wen and his successor Emperor Yang undertook various centralising reforms, most notably among them the equal-field system that aimed to reduce economic inequality and improve agricultural productivity, the Five Departments and Six Boards system, which preceded the Three Departments and Six Ministries system, and the standardisation and re-unification of the coinage. The Sui also encouraged the spread of Buddhism throughout the empire. By the dynasty's mid-point, the state experienced considerable prosperity, enjoying a vast agricultural surplus that supported rapid population growth.
Kaifeng (Chinese: 开封; pinyin: Kāifēng) is a prefecture-level city in east-central Henan province, China. It is one of the Eight Ancient Capitals of China, having been the capital eight times in history, most notably during the Northern Song dynasty.
As of the 2020 census, 4,824,016 people lived in Kaifeng's Prefecture, of whom 1,735,581 lived in the metropolitan area consisting of Xiangfu, Longting, Shunhe Hui, Gulou and Yuwantai Districts. Located along the Yellow River's southern bank, it borders the provincial capital of Zhengzhou to the west, Xinxiang to the northwest, Shangqiu to the east, Zhoukou to the southeast, Xuchang to the southwest, and Heze of Shandong to the northeast.
Shaanxi is a province in north Northwestern China bordering the province-level divisions of Inner Mongolia to the north; Shanxi and Henan to the east; Hubei, Chongqing, and Sichuan to the south; and Gansu and Ningxia to the west. Shaanxi covers an area of over 205,000 km (79,000 sq mi) with about 37 million people, the 16th-largest in China. Xi'an, which includes the sites of the former capitals Fenghao and Chang'an – is the provincial capital and largest city in Northwest China and also one of the oldest cities in China. It is also the oldest of the Four Ancient Capitals, being the capital for the Western Zhou, Western Han, Jin, Sui and Tang dynasties. Xianyang, which served as the capital of the Qin dynasty (221–206 BC), is just north across the Wei River. The other prefecture-level cities into which the province is divided are Ankang, Baoji, Hanzhong, Shangluo, Tongchuan, Weinan, Yan'an and Yulin.
The province is geographically divided into three parts, namely Northern (or "Shaanbei"), Central ("Shaanzhong") and Southern Shaanxi (or "Shaannan"). Northern Shaanxi makes up the southeastern portion of the Ordos Basin and mainly comprises the two prefectural cities of Yulin and Yan'an on the northern Loess Plateau, demarcated from the Ordos Desert and the grasslands of Inner Mongolia's Ordos City by the Ming Great Wall. Central Shaanxi is also known as the Guanzhong region, and comprises the drainage basin of lower Wei River east of Mount Liupan and north of the Qinling Mountains, where the majority of Shaanxi's population reside. Southern Shaanxi comprises the three prefectural cities in the edge of the historical Bashu region south of the Qinling Mountains and includes the three mountainous cities of Hanzhong, Ankang and Shangluo.
Luoyang (simplified Chinese: 洛阳; traditional Chinese: 洛陽; pinyin: Luòyáng) is a city located in the confluence area of the Luo River and the Yellow River in the west of Henan province, China. Governed as a prefecture-level city, it borders the provincial capital of Zhengzhou to the east, Pingdingshan to the southeast, Nanyang to the south, Sanmenxia to the west, Jiyuan to the north, and Jiaozuo to the northeast. As of December 31, 2018, Luoyang had a population of 6,888,500 inhabitants with 2,751,400 people living in the built-up (or metro) area made of the city's five out of six urban districts (except the Jili District not continuously urbanized) and Yanshi District, now being conurbated. By the end of 2022, Luoyang Municipality had jurisdiction over 7 municipal districts, 7 counties and 1 development zone. The permanent population was 7.079 million as of 2022.
Situated on the central plain of China, Luoyang is among the oldest cities in China and one of the cradles of Chinese civilization. It is the earliest of the Four Great Ancient Capitals of China.
Nanjing is the capital of Jiangsu, a province in East China. The city, which is located in the southwestern corner of the province, has 11 districts, an administrative area of 6,600 km (2,500 sq mi), and as of 2021 a population of 9,423,400.Situated in the Yangtze River Delta, Nanjing has a prominent place in Chinese history and culture, having served as the capital of various Chinese dynasties, kingdoms and republican governments dating from the 3rd century to 1949, and has thus long been a major center of culture, education, research, politics, economy, transport networks and tourism, being the home to one of the world's largest inland ports. The city is also one of the fifteen sub-provincial cities in the People's Republic of China's administrative structure, enjoying jurisdictional and economic autonomy only slightly less than that of a province. It has also been awarded the title of 2008 Habitat Scroll of Honor of China, Special UN Habitat Scroll of Honor Award and National Civilized City. Nanjing is also considered a Beta (global second-tier) city classification, together with Chongqing, Hangzhou and Tianjin by the Globalization and World Cities Research Network, and ranked as one of the world's top 100 cities in the Global Financial Centres Index.
As of 2021, Nanjing has 68 institutions of higher learning, including 13 double-first-class universities, ten 111-plan universities, eight 211 universities, and 97 academies. Nanjing University, which has a long history, is among the world's top 10 universities ranked by the Nature Index. The ratio of college students to the total population ranks No.1 among large cities nationwide. Nanjing has the fifth-largest scientific research output of any city in the world. As of 2024, it has been ranked as the world's second most prolific scientific research center in earth and environmental sciences and the world's third most prolific scientific research center in chemistry and physical sciences, according to the Nature Index.
Henan is a province in Central China, home to many heritage sites which include Yinxu, the ruins of the final capital of the Shang dynasty (c. 1600 – c. 1050 BC) and the Shaolin Temple. Four of the historical capitals of China, Luoyang, Anyang, Kaifeng and Zhengzhou, are in Henan.
While the province's name means 'south of the river', approximately a quarter of the province lies north of the Yellow River. With an area of 167,000 km (64,000 sq mi), Henan covers a large part of the fertile and densely populated North China Plain. Its neighboring provinces are Shaanxi, Shanxi, Hebei, Shandong, Anhui, and Hubei.
Khanbaliq (Chinese: 汗八里; pinyin: Hánbālǐ; Mongolian: ᠬᠠᠭᠠᠨ ᠪᠠᠯᠭᠠᠰᠤ, Qaɣan balɣasu) or Dadu (Chinese: 元大都; pinyin: Yuán Dàdū; Mongolian: ᠳᠠᠶ᠋ᠢᠳᠤ, Dayidu) was the winter capital of the Mongol-led Yuan dynasty in what is now Beijing, the capital of China today. It was located at the center of modern Beijing. The Secretariat directly administered the Central Region (腹裏) of the Yuan dynasty (comprising present-day Beijing, Hebei, Shandong, Shanxi, and parts of Henan and Inner Mongolia) and dictated policies for the other provinces. As emperors of the Yuan dynasty, Kublai Khan and his successors also claimed supremacy over the entire Mongol Empire following the death of Möngke (Kublai's brother and predecessor) in 1259. Over time the unified empire gradually fragmented into a number of khanates.
Khanbaliq is the direct predecessor to modern Beijing. Several stations of the modern city's subway's Line 10 and Line 13 are named after the gates of Dadu.