Ding Jiageng studied under Sha Menghai, and he was guided by the master at the beginning, and he succeeded as a young man; he sought advice from Ouyang Gong, and he learned the true meaning from heart to mouth, and achieved positive results; he received a bachelor's degree in reading law, and accumulated accumulated knowledge to solidify his foundation. Inspiring and diligent in learning, constantly striving for self-improvement, vigorous and vigorous, and free to specialize. With no distractions, in order to have a good word, you can endure the cold for half a night; if you concentrate on it, in order to have a stable word, you can practice until the fifth watch. It can be traced back to the stele editions of the Qin and Han dynasties, and the calligraphy style of the Tang and Song dynasties. Winter and summer change, reading posts day and night, breaking out of the cocoon and turning into a butterfly, achieving success and shocking the world; accumulating in the spring and autumn, studying in the pond, phoenix bathing in the fire, achieving success and fame, and flying thousands of miles. Establish a different path, seek spiritual energy, and reject craftsmanship; be strict in laws, cultivate elegance, and reject vulgarity; be quiet and profound, gain tranquility, and reject impotence. The ink is exquisite and the pen is unique. Learn from the past without imitating the past, and strive to improve the old; inherit the teacher without imitating the teacher, and aim to create something new. Sha Weng praised it: "Learn from the past and learn from the old, create something new, elegant and powerful, and have a certain degree of escape." Zhang Hai, chairman of the Chinese Calligraphers Association, commented: "Siyi is superb"; Liu Bingsen, vice chairman of the Chinese Calligraphers Association, commented: " "Elegant, graceful and creative"; Li Duo, a master calligrapher, praised: "He does not attack people of his time, does not disparage his friends, and is praised by his colleagues." Fei Xiaotong once said that his calligraphy is "elephant, university, majestic, and big, so it is a great success." Regular script, cursive and seal script can be used in all styles; large and small, long and short, and can be used freely. Its seal script is euphemistic and flexible, and it is superb; its cursive script is like running to the spring when thirsty, and the clouds gather and disperse; its regular script is elegant and rigorous, and its power penetrates the back of the paper; its official script is simple and rich, with profound meaning. His running script is smooth, the paper falls like flying, and the lines are broken and the meaning is connected. The calligraphy circle highly praises his calligraphy style: it has the shock of the Six Dynasties monuments and the influence of calligraphy of the Northern Song Dynasty; it has the majestic beauty of the horse Shuo Feng and the wind and rain in the desert north, and it also has the tenderness of the apricot blossoms and spring rain in the south of the Yangtze River, which is like water; It has the boldness of the river going eastward, but also the sadness and elegance of the chilling cicada.