Yes, Mr. Yu Dequan is a famous calligrapher in my country. Because he has made great contributions to traditional Chinese culture in couplets and is recognized as the master of couplets, people know relatively little about his calligraphy. In fact, Mr. Yu is a calligraphy researcher at the Central Museum of Literature and History, a leading instructor at the Institute of Calligraphy at Central South University, and the dean of the Xiangjiang Academy of Calligraphy and Painting. His masterpieces on calligraphy academics include "Chapter of Chapters and Grasses", "Reprints of Chapters and Grasses", etc., and his personal calligraphy works have been published in many places across the country. There are exhibitions in all provinces. In Sichuan, there is the "Yu Dequan Art Museum" named after Mr. Yu Dequan, and in Hunan there is the "Dequan Chinese Academy of Sciences" named after him. He has published more than 40 books with more than 10 million words. . . . . . It is recommended to search more on Baidu, there are many introductions by Mr. Yu Dequan.