"Nagato has no way to wash himself, so why bother with pearls to soothe his loneliness?" comes from Jiang Caiping's work "A Dendrobium of Pearls" (also known as "Thanks for the Pearl").
Interpretation of "Yizhu Zhu" ("Thank you for the pearl"):
I haven't painted my willow eyebrows for a long time, and the remaining makeup on my face and tears have wet my face. Red gauze clothes.
I haven’t washed myself in a long time, so you don’t need to give me a bunch of pearls to comfort my lonely heart.
Creative background of "A Dendrobium of Pearls" ("Thank You for the Pearl"):
It is said that after the death of Emperor Xuanzong's favorite concubine Wu Hui, Xuanzong was depressed all day long. The eunuch Gao Lishi wanted to relieve Xuanzong's troubles, so he went to the south of the Yangtze River to look for beauties. As a result, he found a girl with a clear heart and quality in Putian County, Fujian. She was Jiang Caiping.
After Jiang Caiping was selected into the palace by Gao Lishi, she was deeply favored by Xuanzong. She wears light and elegant clothes, has a graceful posture, and has an indescribable charm and charm. She is proficient in poetry. Because of her love for plum blossoms, plum trees were planted everywhere where she lived. Whenever the plum blossoms were in full bloom, she would admire the flowers and stay in love with them. Emperor Xuanzong of the Tang Dynasty nicknamed her Mei Fei, and also jokingly called her "Plum Essence". Tang Xuanzong loved her so much that other concubines in the harem turned a blind eye. Jiang Caiping has an aloof temperament and a self-proclaimed, clean-eyed look, but she is untainted by the mud. She does not fight for beauty, and is good at calligraphy. She often compares herself to Xie Daoyun, a talented woman from the Eastern Jin Dynasty.
It was just the arrival of Yang Yuhuan that made the aloof and aloof Concubine Mei gradually fall out of favor. Concubine Yang managed to demote Concubine Mei to Shangyangdong Palace in the cold palace. When Concubine Mei was favored, people from all over the country rushed to offer plum blossoms. Once, she heard the sound of a horse running outside and asked the waiter if he was bringing plum blossoms? But now, everyone is busy sending lychees to Concubine Yang. Who still remembers Concubine Mei Jiang Caiping, who was once doted on? Later, Emperor Xuanzong of the later Tang Dynasty sent her a box of pearls as a tribute to express her comfort. However, Mei Fei did not accept it and wrote this poem in response to the Emperor of Tang Dynasty.