What is Song Guang's contribution to the literary world?

Song Guang, born in Hongwu, Nanyang, Henan Province, was born in an unknown year. Song Guang was good at cursive writing, lived in Zhang Xu and Huai Su, and finally formed a personal appearance with a circle to a loop winding into a few square folds. Judging from his cursive works "Wind Entering Song Axis" and "Taibai Liquor Song Axis", stippling is vertical and horizontal, graceful and full of momentum. But the pen is more plain and round, less steep and depressed, and seems too smooth and weak. Compared with Song Ke and Wang Sui in Song Dynasty, they are not as good as people in personality, but also lack of ancient meaning in breath. Therefore, Zhu Yunming said in his evaluation of his calligraphy: "The country was in the early Song Dynasty, so it is the best. Chang people are familiar and charming, like Ke Ye." Tao's "Book History Society" also said: "(Song Guang) often keeps more than ten people connected, which is not ancient." Born in an unknown year, Gu and Huating (now Songjiang, Shanghai) are from Wendong. Wu Hong was a scholar, official and judge, and later moved to Huguang. Calligraphy is as famous as Trilogy.