He Ershui. Liu Bingsen got to know several teachers one after another. The first is Dong Shouping, a famous calligrapher and painter, and the second is He Ershui. Dong Shouping's artistic attainments are mainly in traditional Chinese painting. Although he is also good at calligraphy, his artistic achievements may be far inferior to painting. Liu Bingsen's most important artistic achievements are in calligraphy and official script. From this point of view, the teacher who had a greater influence on him in brush creation is undoubtedly He Ershui.