Song Renzong Zhao Zhen was the fourth emperor of the Song Dynasty. He was known as the most kind emperor in history and a great talent. He is proficient in music, chess, calligraphy, painting and poetry, especially calligraphy, and is good at Fei Bai calligraphy. Ouyang Xiuyun of the Song Dynasty said: "Renzong had nothing to do in his free time, but to practice calligraphy and ink, and Feibai is particularly magical." He wrote the "Lanting Preface", which has been widely praised by calligraphers and painters for thousands of years.