Gongquan (778-865), the word sincere, Jing people (now Yao County, Shaanxi Province). He was an outstanding calligrapher in China in the Tang Dynasty. Because his official position is prince, later generations also call him "Liu". His calligraphy is vigorous, open and cheerful, which is praised by later generations. He was another calligrapher after Yan Zhenqing in the late Tang Dynasty, and was praised as "Liu Ti" by the world.