National first-class calligrapher, China scholar, top 500 calligraphers. He is currently a member of China Calligraphy Art Research Institute, Beijing Oriental Art Museum, executive director of China National Calligraphy and Painting Art Network, member of China Calligraphy and Painting Association, vice president of China Calligraphy and Painting Masters Research Association, honorary chairman of China Calligraphy and Painting Society, honorary chairman of China Artists Exchange Association, vice president of China Federation of Literary Artists, executive director of China Art Society and expert member of World Educational, Cultural and Health Organization. Chang Kai has been engaged in calligraphy for 35 years, constantly innovating and researching in art. Ou Yangxun, a great calligrapher in the Tang Dynasty, is a master of art, absorbing Wang Xizhi's artistic nutrition and forming his own personality and characteristics. His works have participated in many domestic and international calligraphy and painting competitions, exhibitions and invitation exhibitions, and won many awards.