Map - Aihui Town (Aihui)

Aihui Town (Aihui)
Aigun (Manchu: aihūn hoton; Айгунь) was a historic Chinese town in northern Manchuria, situated on the right bank of the Amur River, some 30 km south (downstream) from the central urban area of Heihe (which is across the Amur from the mouth of the Zeya River and Blagoveschensk).

The Chinese name of the town, which literally means "Bright Jade", is a transliteration of the Manchu (or Ducher) name of the town.

Today the former city of Aigun is called Aihui Town and is part of Aihui District, which in turn is part of the prefecture-level city of Heihe. Heihe is one of the major cities in Heilongjiang Province.

The predecessor of Aigun was a town of the indigenous Ducher people of the Amur Valley, located on the left (northeastern - now Russian) bank of the Amur River. The site of this town, whose name was reported by the Russian explorer Yerofey Khabarov as Aytyun (Айтюн) in 1652, is currently known to archaeologists as the Grodekovo site (Гродековское городище), after the nearby village of Grodekovo. It is thought to have been populated since around the end of the 1st or the beginning of the 2nd millennium AD.

Some sources report a Chinese presence on the middle Amur – a fort existed at Aigun for about 20 years during the Yongle era on the left (northwestern) shore of the Amur downstream from the mouth of the Zeya River. This Ming Dynasty Aigun was located on the opposite bank to the later Aigun that was relocated during the Qing Dynasty.

The Ducher town was probably vacated when the Duchers were evacuated by the Manchu Chinese Qing Dynasty to the Sungari or Hurka in the mid-1650s. In 1683-85 the Manchus re-used the site as a base for their campaign against the Russian fort of Albazin.

After the capture of Albazin in 1685 or 1686, the Manchus relocated the town to a new site on the right (southwestern) bank of the Amur, about 3 mi downstream from the original site. The new site occupied the location of the former village of a Daurian chief named Tolga. The city became known primarily under its Manchu name Saghalien Ula hoton (Manchu: sahaliyan ula hoton), and sometimes also under the Chinese translation of this name, Heilongjiang Cheng (黑龍江城). Both names mean "Black River City", but by the 19th century the name "Aigun" again became more current in the western languages.

For a number of years after 1683, Aigun served as the capital (the seat of the Military Governor) of Heilongjiang Province, until the capital was moved to Nenjiang (Mergen) in 1690, and later to Qiqihar. Aigun, however, remained the seat of the Deputy Lieutenant-General (Fu dutong), responsible for a large district covering much of the Amur Valley within the province of Heilongjiang as it existed in those days.

As a part of a nationwide Sino-French cartographic program, Aigun (or, rather, Saghalien Ula hoton) was visited ca. 1709 by the Jesuits Jean-Baptiste Régis, Pierre Jartoux, and Xavier Ehrenbert Fridelli, who found it a well-defended town, serving as the base of a Manchu river fleet controlling the Amur River region. Surrounded by numerous villages on the fertile riverside plain, the town was well provisioned with foodstuffs.

It was at Aigun in May 1858 that Nikolay Muravyov concluded the Aigun Treaty, according to which the left bank of the Amur River was conceded to Russia. 
Map - Aihui Town (Aihui)
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China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and borders fourteen countries by land, the most of any country in the world, tied with Russia. With an area of approximately 9.6 e6sqkm, it is the world's third largest country by total land area. The country consists of 23 provinces, five autonomous regions, four municipalities, and two Special Administrative Regions (Hong Kong and Macau). The national capital is Beijing, and the most populous city and financial center is Shanghai.

Modern Chinese trace their origins to a cradle of civilization in the fertile basin of the Yellow River in the North China Plain. The semi-legendary Xia dynasty in the 21st century BCE and the well-attested Shang and Zhou dynasties developed a bureaucratic political system to serve hereditary monarchies, or dynasties. Chinese writing, Chinese classic literature, and the Hundred Schools of Thought emerged during this period and influenced China and its neighbors for centuries to come. In the third century BCE, Qin's wars of unification created the first Chinese empire, the short-lived Qin dynasty. The Qin was followed by the more stable Han dynasty (206 BCE–220 CE), which established a model for nearly two millennia in which the Chinese empire was one of the world's foremost economic powers. The empire expanded, fractured, and reunified; was conquered and reestablished; absorbed foreign religions and ideas; and made world-leading scientific advances, such as the Four Great Inventions: gunpowder, paper, the compass, and printing. After centuries of disunity following the fall of the Han, the Sui (581–618) and Tang (618–907) dynasties reunified the empire. The multi-ethnic Tang welcomed foreign trade and culture that came over the Silk Road and adapted Buddhism to Chinese needs. The early modern Song dynasty (960–1279) became increasingly urban and commercial. The civilian scholar-officials or literati used the examination system and the doctrines of Neo-Confucianism to replace the military aristocrats of earlier dynasties. The Mongol invasion established the Yuan dynasty in 1279, but the Ming dynasty (1368–1644) re-established Han Chinese control. The Manchu-led Qing dynasty nearly doubled the empire's territory and established a multi-ethnic state that was the basis of the modern Chinese nation, but suffered heavy losses to foreign imperialism in the 19th century.
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