Right: Bing Shen's Three Questions on Winter Moon, the main book of Jun Shu?

? Yan Jingshan, whose pen name is Yumu, is the master of Shuang Yi, the master of Sanwen Zhai, and the lay man of Tongcheng. Shanxi Wenxi, an economist. He is currently a member of the Education Committee of China Calligraphy Art Research Institute, a member of China Hard Pen Calligraphy Association, a member of the Calligraphy Art Committee of China Couplet Society, a vice president of China Huanghe Cursive Calligraphy Research Institute, a vice president of China-Korea Calligraphy and Painting Art Exchange Association, a member of Shanxi Calligraphers Association and a member of Yuncheng Calligraphers Association.