Is there a difference between Xu Mingjun's root art calligraphy and painting and ordinary calligraphy?

Of course there is a big difference. Huyi root carving emphasizes the beauty of lines, space and color. Calligraphy art forms a beautiful combination through the expansion and contraction of Chinese character stippling and the torsion of axis, and ink color is also consistent with the beauty of structure. There is still a difference between the two, and Xu Ming combined them well.