People's Education Edition junior high school Chinese has an ancient poem after each class, which is handwritten in block letters or lines. Who wrote these calligraphy?

Liu Jinkai, born in September, 1957, is from Suning, Hebei. Edit. He is currently the deputy director of the Press and Publication Committee of China Calligraphers Association, the deputy secretary of the Party Group of Hebei Federation of Literary and Art Circles, the vice chairman of Hebei Federation of Literary and Art Circles, the chairman of Hebei Calligraphy Association, the director of the Calligraphy Committee of Hebei Calligraphy Association, the director of the Organizing Committee, and the senior consultant of Hebei Yishutang Painting and Calligraphy Institute.