Adjust one's mind and tell fortune.

Liu Gongquan, a calligrapher in the Tang Dynasty, said that the most important thing in writing is heart. If you have an upright attitude, your handwriting will look correct. Liu Gongquan expressed the importance of moral cultivation to Tang Muzong in this unique way, which was later called "pen admonition". Liu Gongquan (778-865) was born in Jingzhao Garden (now Yaozhou District, Tongchuan City, Shaanxi Province). Liu Gongquan, a native of Liushi, Hedong, was an official, calligrapher and poet in the middle Tang Dynasty, the son of Danzhou secretariat, the brother of Danzhou secretariat, the minister of war, and a scholar in the first year of Yuanhe. He became a schoolmaster and entered the Li Ting shogunate. Liu Gongquan worked in the official residences of Mu Zong, Jing Zong and Wenzong, and grew up in North Korea. He has served as a great official in the seven dynasties, a tired official, a prince, a duke of Hedong, and was called "Liu" in the world. In his later years, he became an official with Prince Taibao. In the sixth year of Xian Tong (865), Liu Gongquan died at the age of 88 and was given to the Prince.