1. "Twenty years ago, I didn't know the cold, and I sang a song that filled the world" is a poem by Xu Shiqiao, a famous modern seal carver; 2. The whole poem is as follows: For twenty years, I didn't know the cold, and I sang a song that filled the world. Participated. The return of the Southern Kingdom brings good news. Who knows the new words and ancient tunes better? 3. Allusions: In 1128 AD, 45-year-old Li Qingzhao and her husband Zhao Mingcheng crossed south amid a fire in Qingzhou and lived in Jinling. One day when I was on the street, I saw a little girl carrying her piano and selling herself to bury her father. Li Qingzhao couldn't bear it and spent all his money to save his daughter and buy the Yaoqin. After wars broke out one after another, Li Qingzhao was still reluctant to leave the piano behind while running around. In the end, the couple died in the south of the Yangtze River, and the piano also passed through the Yuan, Ming and Qing dynasties, and found its way into the families of a prosperous family in the ancient capital of Jinling. In the end, the piano was acquired by Zhang Zhengyin, a famous guqin player in Nanjing. Zhang Zhengyin is a student of Zhang Daqian. He is a master of painting. He has also been obsessed with playing the piano all his life and has profound attainments in the art of playing the piano. After he got the piano, he asked his friend and famous scholar Mr. Gao Ershi to give him a pen. The famous seal engraver Mr. Xu Shiqiao used a knife to carve a poem he wrote on the piano: "Twenty years ago, I didn't know the cold, and a song filled the world." "Come back from the South to bring good news. Who knows the new words and ancient tunes better?" Later, he spent all his money to buy three famous guqins including "Bixiao Pei". During the "Cultural Revolution", this son of an aristocratic family was reluctant to sell his guqin even though his family was living in poverty and had difficulty eating. Once, he couldn't stand being criticized anymore, so he jumped off a cliff in Yanzifan and committed suicide. Between life and death, he couldn't let go of his guqin, so he retreated from the cliff again. In his later years, Zhang Zhengyin gave three guqins to his three guqin disciples. They are Li Yuxian, Gong Yi and Ma Jie, who are famous in the guqin world. The guqin played by Li Qingzhao and later renamed "Zhengyin" was given to Gong Yi.