On this day, 382 years ago, September 21, 1643 (August 9, 1643, the lunar calendar), why did Huang Taiji change the name of the country to Qing Dynasty? On September 21, 1643, Huang Tai died. Huang Taiji was born on October 25, the 20th year of Wanli of the Ming Dynasty. He was respectfully known as Emperor Tiancong of the Later Jin Dynasty, Aixinjuruo Huangji, and also known as Emperor Taizong of the Qing Dynasty, Chongde (Wen) Emperor Huangji. During his lifetime, Huang Taiji protected the Han people, reduced the burden on farmers, and moved the capital to Shenyang (the decision of his father Nurhachi to move the capital), namely Shengjing, Manchuria. In 1636, Huang Taiji took control of Monan Mongolia and changed the name of the country to "Qing Dynasty" and changed its name to Yuan Chongde. He was the actual founder and founding emperor of the Qing Empire. In the first month of the eleventh year of Tianming (1626), Nurhachi attacked but failed to defeat it in the Battle of Ningyuan. Huang Taiji personally came to the battlefield and witnessed the most painful defeat of the Eight Banners Army. In 1627, Huang Taiji personally led his army to launch the Battle of Ningjin, which was defeated again. Later, he induced Sizong of the Ming Dynasty to execute Yuan Chonghuan, copied red-clad cannons, and established a modern artillery force-the Heavy Army. In the sixth year of Chongde, that is, in July of the 14th year of Chongzhen (1641), there was a battle to rescue Songjin due to illness. History records that "the ascent was urgent, the epistaxis continued, and the burden was borne by the burden." They traveled more than 500 miles day and night without stopping. The Ming army was defeated in Songshan and Hong Chengchou was captured alive."Records of Taizong of the Qing Dynasty" records: "During the battle, a total of 53,783 enemy troops were killed and 7,440 horses, 66 camels, and 9,3146 pairs of armor were obtained. The Ming army traveled from Xingshan to Tashan in the south. Many people died when they went to the sea, and tens of thousands of horses and armors were abandoned. The floating corpses float in the sea, as many as wild geese." This battle laid the foundation for the Qing Dynasty to later destroy the Ming Dynasty and conquer the world. "Qing History Manuscript¡¤Taizong Benji" commented: "We grant literature and martial arts, cultivate political affairs internally, carry out crusades in the field, use troops like gods, and make contributions in whatever we seek." Huang Taiji died of a cerebral stroke in the eighth year of Chongde (1643) at the age of 52, just before entering the customs at 10 p.m. on the ninth day of August. He was later buried in Zhaoling, Shenyang (now north of Beiling Park, Shenyang City). Since no heir was appointed before his death, his brother Prince Dorgon and his eldest son, Hauge, fought for the throne and demonstrated against each other. In the end, Dorgun voted alone and supported Fulin, the seven-year-old son of Empress Xiaozhuangwen, for the sake of the Qing Dynasty Shizu. Why did Huang Taiji change the name of the country to Qing Dynasty? Why did Huang Taiji change the national title to Qing Dynasty? What does it mean? Academic circles and Qing history circles have been debating this endlessly. Huang Taiji did not explain himself, nor did the Qing Dynasty's "Emperor Taizong Record" and "Manchu Lao Dang", so future generations could only interpret it according to their own understanding, and thus the story was created. It is said that Nurhachi was fleeing and riding a Daqing horse. He ran very quickly and exhausted the horse. Nurhachi had a lot of affection for the horse and said to the horse,"Daqing, Daqing, you are exhausted for me. In the future, when I win the world, my country name will be Daqing." Qing "and" Qing "are homophonic. This is a legend. In addition to this story, there are at least five interpretations. First, some people explain from the perspective of phonology that Qing and Jin sound similar in Manchu, so Qing is used. Second, some people explain it from historical perspective that none of the many dynasties in China used it clearly. They were afraid of duplication, so they used it clearly. Third, some people also explain it from the perspective of yin and yang and the five elements. In the Ming Dynasty, the left side of the Ming Dynasty is the word sun, the sun is fire, and the left side of the Qing Dynasty is three points of water. Water suppresses fire. Therefore, the Qing Dynasty wanted to extinguish the Ming Dynasty, and he used Qing Dynasty. Fourth, some people explain it from the perspective of shaman culture that clarity is green. The "green" without three waters and the "green" with three waters are the same sound. The blue sky is heaven and auspicious. Fifth, some people explain it from the perspective of ethnicity. It was said that he originally used the Later Jin Dynasty and wanted to invade the Central Plains. As soon as the Central Plains mentioned this "Jin", it remembered the Southern Song Dynasty. When I mention the Jin people, I think of Yue Fei. To reduce resistance when Huang Taiji entered the Central Plains, he did not use the word "gold" and used the word "qing". These five explanations are based on benevolence and wisdom, and no one can convince anyone. Huang Taiji's original year title was Tiancong, but it was changed to Chongde. At this time, the year title of the Ming Dynasty was called Chongzhen, with the word Chong. On the left side of the word Zhen in Chongzhen was Shibu, on the right side was Zhen, and on the left side of the word Shen was Shibu. Therefore, Emperor Chongzhen valued heaven and god. Huang Taiji was changed to Chongde, and on the left side of the word De is Shuangliren, which means Chongren. On the right side of Chongzhen's Zhen is Zhen, and the Zhen used for divination is also related to God. On the right side of the word "De" for Chongzhen is Straight Heart, which means that the heart should be straight and the heart should be upright. Huang Taiji changed Tiancong to Chongde, which respected personnel and civil affairs. Huang Taiji changed the country's name to Jin Qing and the year's name to Tiancong to Chongde, which shows that Huang Taiji had the courage and courage of a politician, as well as the reform and reform of a reformer. It was an epoch-making historical event in the Qing Dynasty.