Ruoxi is, after all, a character in a novel, not a real character.
So that's just the need of the plot.
Matai Ruoxi, according to the novel: the surname Matai, the name Ruoxi, the word Lan Xin; His father was Matai, the governor of Guangdong and Guangxi in the Qing Dynasty; The husband is Yong Zhengdi (Yongzheng), the Qing Sejong; She was born in 169 1, entered the palace at the age of 13, and died in 1725, living for 34 years.
The moral of this name, as described in the story. She is a quiet, intelligent and elegant person among Manchu people. Beautiful, as white as snow; The eyebrows are as curved as the moon, the lips are as small as cherry blossoms, and the waist is as thin as willow, overwhelming everyone with the appearance of a fairy; Both poetry and painting are good, and they can sing and dance well. Her singing voice, her dancing and a good pipa are beyond the reach of Liugong from generation to generation. Not only that, she is also familiar with history books, proficient in melody, and invincible in playing chess. Can be described as a kind-hearted and noble-minded woman.