Emperor Taizong of Qing
Hong Taiji was born in 1592 as the eighth son of Nurhaci. Distinguished early on by his strategic acumen and fluency in both martial skills and Chinese literature, he was deeply relied upon by his father. Following Nurhaci's sudden demise in 1626, Hong Taiji deftly navigated fierce factional rivalries among his brothers and was elected the second Khan of Later Jin. Upon taking power, he steadily transformed the oligopoly of princely rule into an autocracy centered on imperial authority.
Recognizing the danger of a two-front war, Hong Taiji methodically neutralized flank threats before marching into China. He subdued the Chahar Mongols and claimed the legendary Imperial Seal of the Yuan dynasty. In 1627 and 1636, he led punitive invasions against Joseon Korea, forcing King Injo's submission at Namhansanseong Fortress. In 1636, he formally renamed his realm from Later Jin to the Great Qing (Da Qing), assumed the title of Emperor, and proclaimed the collective identity of his people as "Manchu."
A pragmatic reformer, Hong Taiji integrated defecting Han artillery specialists and established dedicated Hongyipao casting foundries. When his 1629 raid on Beijing was checked by the incorruptible Ming marshal Yuan Chonghuan, Hong Taiji forged documents framing Yuan for treason, causing the paranoid Chongzhen Emperor to execute his own savior. In 1642, he shattered the last Ming field army at the Battle of Songshan. However, on the eve of passing the Great Wall, Hong Taiji died suddenly in Mukden Palace in autumn 1643 at the age of 51.