Why did Huang Taiji use Qing as a title?
The ancestors of Manchu were originally Jurchen tribes in the Jin Dynasty, so Nuerhachi unified the ministries of Jurchen and named the country "Daikin". Soon, in order to distinguish it from the Jin Dynasty in history, it was renamed "Houjin". Many Mongolians, Hans, Koreans, etc. They are all ruled by it, and it is no longer suitable for the title of "Houjin"; Moreover, due to historical influence, the Han people have bad feelings for the Jin people, and the title of "post-Jin" is not suitable for attracting the Han people. Therefore, ten years after Huang taiji ascended the throne (1636), the country name was changed to "Qing".
Then, why did Huang Taiji use "Qing" as the country name?
There are two ways to say this. It is said that in the year before the change of "late Jin" to "Qing", Huang Taiji had abolished the clan name of "Nuzhen" and changed it to "Manchuria". "Manchukuo" is similar to "Schumann" in Manchu, originally the name of Buddha, meaning "Emperor of Qing Dynasty", and it is the incarnation of Buddha. Therefore, he used "Qing" instead of "Jin", which won the hearts of all ethnic groups better than "Dajin" or "Houjin" and further replaced the Ming Dynasty. At the same time, Huang taiji also made a big public opinion to overthrow and replace the Ming Dynasty, saying that only people with virtue can rule the world, "people with virtue can be called the son of heaven", and "those with virtue make orders, but those without virtue abandon them" became the core of his thought. Moreover, the "virtue" he said means "Qing", which coincides with the meaning of "Manchuria", so "Qing" is used as the country name.
On the other hand, on the contrary. Qing in Manchu means Jin, while Qing in Chinese means Jin in Manchu. Changing "Jin" to "Qing" means changing Chinese instead of Manchu, and its purpose is only to meet the needs of attacking Ming and make it easy for Han people to accept. Those who hold this view take the Manchu appellation "Fujin" as an example, saying that Fujin was originally called "Fujin", later renamed "Fujin" and finally called "Fujin", so "Fu" is homophonic with "Fu" and "Jin" in Manchu, so according to Manchu phonology, this statement also has the number of closed craftsmen in Shenyang (the old capital of Qing Dynasty). On the plaque, "Dajin" is written in Chinese and "Daqing" is written in Manchu. This plaque was erected during the reign of Tiancong. At that time, it was not renamed "Qing", but it was already called "Qing" in Manchu.
The reasons for the two statements are different, but they all think that the change of the title to "Qing" is due to political needs, mainly to win over the Han people and prepare for the replacement of the Ming Dynasty. From this point of view, when the first statement is regarded as affirmative, this can be proved by the fact that the rulers of the Qing Dynasty kept the names of "Nuzhen" and "Daikin" secret.