Liu Yong (about 987- about 1053), a famous poet in the northern song dynasty, is the most representative figure of graceful and restrained school. Han nationality, a native of Chong 'an (now Wuyishan, Fujian), was originally named Sanbian, with the word Jingzhuang, and later renamed Yong, with a clear word, ranking seventh, also known as Liu Qi. He is a scholar in the imperial court, and the official is Yuan Wailang, so he is known as Liu Tuntian in the world. He called himself "Liu Sanbian, who wrote lyrics in sequence", devoted his life to lyrics and boasted that "white clothes are fluttering". His poems mostly describe the city scenery and the life of geisha, and he is especially good at expressing his feelings of travel and service, and has created many slow words. Description, scene blending, popular language and harmonious melody were widely circulated at that time. It is said that "where there is well water to drink, there is Liu Ci to sing", which has a great influence on the development of Song Ci.