Is there a figure named Fifth Elder Brother Yongqi in history?

Yes, his real name is Aixinjueluo Yongqi.

Aixinjueluo Yongqi (March 23, 1741 - April 16, 1766), a member of the Qing Dynasty clan. Named Junting, nicknamed Tengqin Jushi, the fifth son of Emperor Gaozong Qianlong of the Qing Dynasty, and his mother was the concubine Keliete of Yu. In November of the 30th year of Qianlong's reign, he was granted the title of Prince. Yongqi Shao was good at riding and shooting, and he was good at Mandarin, so he was loved by his superiors. In March of the 31st year of Qianlong's reign, he died. His posthumous title was Chun.

He was smart and learned at a young age. He rarely practiced horse riding and archery, and his martial arts skills were quite good. Erudite and versatile, he is proficient in Manchu, Chinese, and Mongolian, and is familiar with astronomy, geography, and calendar calculations. He is especially good at astronomical algorithms, and his eight-line method hand scroll is extremely precise. The author of "Jiao Tong_Manuscript" has been handed down from generation to generation. The algorithm was passed down to Zi Mianyi, and then to Sun Yihui, who recorded its outline in "Original Form".

Yongqi is good at calligraphy and painting, especially good at calligraphy. He is as famous as Prince Yong_, the eleventh son of the emperor. On the fifth day of May in the twenty-eighth year of Qianlong's reign (1763), there was a fire in the Jiuzhou Qingyan Palace in Old Summer Palace. Yongqi personally carried Qianlong and escaped from the fire. In November of the 30th year (1765), he was granted the title of Prince Heshuorong. He was deeply loved by Qianlong, who wanted him to inherit the throne.

Extended information:

Historical evaluation

Yongqi was a real person in history, and he was highly evaluated, saying that he was smart and eager to learn since childhood. , capable of riding and shooting, proficient in Manchu, Chinese, and Mongolian, familiar with astronomy, geography, and algorithms, and also accomplished in calligraphy and painting, so he was deeply loved by Emperor Qianlong. An article "Listening to the Family History of the Fifth Elder Brother Yongqi's Descendants" said that Yongqi had a pure nature.

Memorial for later generations

Prince Rong’s Mansion: Yongqi’s residence, Prince Rong’s Mansion, is located on the west side of Taiping Lake inside Xuanwumen. It is now the seat of the Central Conservatory of Music, with its gate, main hall, back building and other buildings Still visible. Zhao_'s "Xiaoting Miscellaneous Records" records that "this garden is both good and the gardens are also good."

Later it became the residence of Prince Chunxian Yi_, who was the biological father of Emperor Guangxu. Because the old Prince Chun's Mansion was the birthplace of Guangxu, after Guangxu inherited the throne, it was the Qianlong Mansion, which was no longer suitable for ordinary people to live in. Prince Chun's Mansion was moved to the north bank of Chahai, commonly known as the New Prince Chun's Mansion.

Baidu Encyclopedia--Aixinjueluo Yongqi