Who is the historical prototype of Zhen Xuan in The Empress of the Harem?

The prototype of empresses in Zhen Xuan Palace is the road of cattle. Zhen Xuan is real. The prototype of her historical figure is Niu Zhilu, the imperial concubine Xi conferred by Yong Zhengdi, and the biological mother of Emperor Qianlong. Niu Zhilu experienced Kangxi, Yongzheng and Qianlong dynasties, and she was also called the most blessed person by Kangxi.

Xiao sheng xian Hou

Born in the 30th year of Kangxi (A.D. 169 1), she was the daughter of Zhu Ling, a fourth-class ritual vessel in Zhenghuang Banner of Manchuria. In the 43rd year of Kangxi (1704), Niu 13 years old entered the mansion of the fourth son of the emperor at that time through the way of female champion (the age of female champion in Qing Dynasty was 13~ 16 years old).

After Yongzheng ascended the throne, she was conferred the title of Princess Xi in the first year of Yongzheng (A.D. 1723), and was promoted to Princess Xi in the eighth year of Yongzheng (A.D. 1730), ranking second only to the queen. After the death of the queen in the ninth year of Yongzheng, she was in charge of the harem. In the fiftieth year of Kangxi, Li Hongsheng was born on August 13th (17 1 1 September 25th).