Qing dynasty Chinese system
Identity in China was strongly dependent on the Eight Banner system during the Manchu-led Qing dynasty (1644–1912). China consisted of multiple ethnic groups, of which the Han, Mongols and Manchus participated in the banner system. Identity, however, was defined much more by culture, language and participation in the military (the Eight Banners) until the Qianlong Emperor resurrected the ethnic classifications. 
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Eight Banners.
The Eight Banners represented military organisation and served as the primary organisational structure of Manchu (Jurchen) society. The banner armies gradually evolved over time to include members from non-Jurchen/Manchu ethnic groups such as the Mongols and Han Chinese. There were three main types of banners: Manchus of Eight Banners (), Mongols of Eight Banners () and Han Army of Eight Banners ().
Beginning in the late 1620s, the Jurchens started incorporating Mongol tribes, which they either conquered or were allied with, into the Eight Banners system. The Han Chinese who first joined the Eight Banners were replacements for Jurchen soldiers in existing banners who were killed in battle. However, over time, as more Han soldiers joined the banners, the Jurchens decided to form a separate group for them. This group, known as the "Old Han Army" (), was mainly used as infantry support. In 1631, a separate Han artillery corps was formed. Four more Han banners were created in 1639. By 1642, the full eight Han banners were established.
The Han banners were known as "Nikan" (Manchu: ;templatestyles src="Template:MongolUnicode/fonts.css" / ;ᠨᡳᡴᠠᠨ, means "Han ethnicity"), Banners and were composed of a large number of Han prisoners-of-war and defectors. Since many of these Han men were single, they married Jurchen women. Over time, there were more and more Han Chinese joining the banners, such that they started to outnumber the Jurchens. The Han Chinese and Jurchens in Liaodong (part of present-day Liaoning Province) started mixing their cultures. Many bannermen forged genealogies for themselves or decided whether to join a Jurchen or Han banner.
The Eight Banners were then created from the old Han and Jurchen banners, which were given equal status. The Mongol banners were also created around this time. Anyone who was not sorted into either a Han or Mongol banner became Manchu, an ethnic group named by Huangtaiji.
Ethnicity.
The three principal ethnic groups in the Later Jin society were the Manchus, Han and Mongols. The country had many other smaller ethnic groups, such as the Xibe, Daur, Russians, Nanai and Evenks (such as Solon). Prior to the Qing dynasty, each group had a significantly distinct culture and language/dialect.
Identity.
During the Qing dynasty (1644–1912), bannermen and civilians were categorised into ethnic groups based on language, culture, behaviour and way of life. Men were grouped into Manchu and Han banners on the basis of their culture and language. The Qing government regarded Han bannermen and the Han civilian population as distinct.
Some descendants of sinicised Jurchens spoke the Han language and had served under the Ming Empire (1368–1644). On the other hand, some ethnic Jurchens actually had Han ancestry but had defected to the Jurchen side, assimilated into Jurchen culture, and lived among the Jurchens in present-day Jilin Province before 1618.
Han and Jurchen assimilation.
Pre-1618.
Han Chinese who deserted the Ming Empire and moved to Nurgan (in present-day Jilin Province) before 1618 and assimilated with the Jurchens were known as transfrontiermen. They adopted Jurchen culture, spoke the Jurchen language, and became part of the Manchu banners.
The Jianzhou Jurchen Khanate led by Nurhaci, the founder of the Qing dynasty, classified people as Jurchen or "nikan" (Han). Those who were considered Jurchen adopted a Jurchen lifestyle, spoke the Jurchen language, and inhabited the eastern part of present-day Jilin Province. On the other hand, those who lived in the west and spoke the Han language were regarded as "nikan", even though some of them had Jurchen or Korean ancestry.
The Manchu, Mongol and Han labels referred to their original composition. Both ethnic Han and sinicised ethnic Jurchens ended up in Han banners.
People from both sides moved between Liaodong and Nurgan. Han soldiers and peasants moved into Nurgan while Jurchen mercenaries and merchants moved to Liaodong, with some lineages on both sides.
1618-1629.
From 1618 to 1629, the Han Chinese from eastern Liaodong who joined the Eight Banners were known as "tai nikan"; the Han Chinese who defected to the Manchus at Fushun were known as "Fushan Nikan" and were considered part of the "tai nikan". Descendants of sinicised Jurchens were conquered by the Jianzhou Jurchen Khanate under Nurhaci's rule after 1618. At that time, these descendants of sinicised Jurchens moved to Liaodong, adopted Han culture and family names, swore loyalty to the Ming Empire and spoke the Han language. They eventually became part of the Han banners. Han Chinese in Ming-ruled Liaodong who defected to the Jurchens after they conquered Liaoding were called "frontiersmen" since they had lived on the frontiers of Ming territory.
The transfrontiersmen became part of the Jurchen elite and were assimilated into Jurchen culture to the point where their ancestry was the only thing that differentiated them from Jurchens. Nurhaci differentiated between groups of Han Chinese based on the date they became part of the Later Jin dynasty, a state created by the Jianzhou Jurchens which later became the Qing dynasty.
When Nurhaci conquered Liaodong, he wanted to win over the allegiance of the Han Chinese, so he ordered Jurchens and Han Chinese to be treated equally. He also seized property and resources owned by Jurchens and redistributed them to Han Chinese, and expanded the Jurchen aristocracy to include Han elite families. However, the Jurchens oppressed Han Chinese for labour and stationed Jurchens in Han households to prevent rebellions. As a result, some disgruntled Han Chinese started a revolt in 1623 by sabotaging and killing Jurchens. In response, Nurhaci introduced a practice of discriminating against Han Chinese. For example, Han Chinese might be executed for committing certain offences whereas Jurchens who committed the same offences might be pardoned. However, Nurhaci exempted the "tai nikan" – Han Chinese who had joined the Jurchens between 1603 and 1619 – from this discriminatory practice.
The Manchu Dahai was described with his origin from the Liao valley and his ethnicity as Han Chinese in the Korean book "Nanjung chamnok; Sok chamnok" (亂中雜錄 / [趙慶南撰) by Cho Kyŏng-nam (趙慶南) (1570–1641) a Korean official and scholar, contradicting Qing texts which says his clan is Giolca. The Qing texts said Dahau's family lived near Fushun in the Giolca region.
1629-1643.
The Han Chinese who joined the banners between 1629 and 1643 came from western Liaodong, Shanxi, Shandong and Zhili. They were known as ""fu xi baitangga".
Huangtaiji appropriated the term "Hanjun" from the Jurchen-led Jin dynasty (1115–1234)'s "miŋgan moumukə" (猛安謀克; Jurchen: military system and used it as the name for the Han banners. Its original and new meanings differed in usage. The Qing dynasty used "Hanjun"" as an adjective for individual bannermen while the Jin dynasty used its literal meaning, for the collective "Han Army".
Nurhaci and Huangtaiji both viewed ethnic identity in terms of culture, language and attitude: Mongols were associated with the Mongol language, nomadism and horses; Manchus were associated with the Manchu language and participation in the banners; Han Chinese were associated with Liaodong, the Han language, agriculture and commerce. Appearance and ancestry were disregarded in favour of culture as the primary factor in differentiating between Manchu and Han. Occasionally identities blurred and could be altered. The creation of the separate Manchu, Mongol and Han banners was rooted in fluctuating categories defined by the Qing government. Banner membership depended on the primary language of the bannermen. It has been suggested that the Han banners were not familiar with the exact meaning of "Hanjun", as the Qing government constantly changed its definition.
Huangtaiji included Han Chinese in his government and adopted the Han style of government. After defeats inflicted by Ming general Yuan Chonghuan upon the Manchus with artillery such as at the Battle of Ningyuan, Huangtaiji recruited Han prisoners-of-war who were trained in firearms into the Manchu army.
Manchu banners inducted (non-bondservant) Han families, such as the family of Bordered Yellow Banner member Zhang Wenxing, the governor of Gansu Province in 1647. Manchu official Duanfang was also Han Chinese. The Manchus' willingness to accept assimilated strangers allowed Han Chinese to integrate into Manchu society.
The Manchus attracted Han military officers to their banners by offering them brides from the Aisin Gioro clan, the imperial clan of the Qing dynasty. A mass marriage of 1,000 Han officers to Manchu women took place in 1632 after Prince Yoto came up with the idea. Huangtaiji said that "since the Han generals and Manchu women lived together and ate together, it would help these surrendered generals to forget their motherland." Women from the Aisin Gioro clan also married other Han officials, such as the sons of Shang Kexi and Geng Zhongming, who defected to the Qing dynasty after their conquest of China. The Manchus created an artillery unit composed of Han soldiers and granted Han officials titles such as "ministers", while Manchus in the same position were regarded as "slaves".
In 1642, the Manchu banners ejected their Han companies and placed them in Han banners, since the members were mostly not assimilated to Manchu culture. However, the banners continued to contain mixed units of both Han and Manchu.
17th century.
Some Han bannermen and their lineages became successful members of Qing nobility and their descendants continued to be awarded noble titles, such as Li Yongfang, who was ennobled by Nurhaci as a third class viscount and enrolled in the Plain Blue Banner and whose descendants remained as nobles. The Manchus not only gave extensive titles and honours to pre-1644 Han defectors, but also arranged for marriages between them and Manchu noblewomen.
In the early Qing dynasty, the Qing government made distinctions between Han bannermen and Han civilians. Former subjects of the Ming dynasty, regardless of their origin, were categorised as Han Chinese, so some Manchus ended up in Mongol and Han banners. Nurhaci also allowed transfrontiersmen to identify themselves as Manchu after assimilation. The Kangxi Emperor later moved both Han and Mongol families to Manchu banners from their original Mongol and Han banners.
Han bannermen such as Geng Zhongming rose to powerful positions and prominence under the Shunzhi Emperor. They "were barely distinguishable from Manchu nobility."
Both Manchus and Han Chinese joined the Han banners before Qing forces passed through Shanhai Pass in 1644. As such, they were both distinguished from Han Chinese who joined the Qing Empire after 1644. The pre-1644 Han bannermen were known as "old men" (). In 1740, the Qianlong Emperor ordered a mass transfer of the "Fushun Nikan" and selected "tai nikan", Koreans and Mongols into the Manchu banners.
Manchu bannermen in Beijing ended up in poverty just decades after the Manchu conquest of China, living in slums and falling into debt, with signs of their plight appearing as soon as 1655. Their poverty forced them to sell their property to Han Chinese, in violation of the law.
In the early Qing dynasty, the emperors took some Han women as concubines. A 1648 decree from the Shunzhi Emperor allowed Han men to marry Manchu women with the permission of the Board of Revenue if the brides were registered daughters of officials or commoners, or with the permission of the banner company captain if they were unregistered commoners. Later, the "xiunü" (秀女; "talented women") system drafted women from the Han banners for the imperial harem, but excluded daughters of Han commoners.
Han bannermen were permitted to marry Han civilian women. However, the emperors were distressed to find that the women followed Han civilian customs in clothing and jewellery when they were drafted for palace service. They then banned daughters of common Han bannermen from serving in the imperial palace as maids and consorts, exempting them from the draft, out of concern for to the economic plight of Han bannermen. Another possible reason was the Qing government's alarm over Han banner girls following Han civilian customs such as wearing robes with wide sleeves, feet binding and wearing a single earring, contrary to Manchu custom. Daughters of Manchu and Mongol bannerman had to submit to the draft where they could be selected to serve in the imperial palace as maids or consorts. Daughters of Han bannermen were exempt this draft.Han banner girls were not allowed to become imperial concubines.
Manchu bannermen typically used their given rather