Qi Gong and Zhou Ruchang were both famous calligraphers and calligraphy critics in China. They had different opinions about Zhang Zhongxing. Qigong believed that Zhang Zhongxing was an outstanding calligrapher. His calligraphy style was unique and profound. It combined the characteristics of many kinds of calligraphy styles and had high artistic value. At the same time, Qigong also believed that Zhang Zhongxing had made great achievements in the field of calligraphy and made important contributions to the development of Chinese calligraphy. Zhou Ruchang held a different point of view. He believed that although Zhang Zhongxing was an outstanding calligrapher, his calligraphy attainments had not reached a very high level. Some of his works still had certain problems. In addition, Zhou Ruchang also believed that Zhang Zhongxing's development in the field of calligraphy had some limitations. His calligraphy style had not been widely recognized and influential. In general, Qi Gong and Zhou Ruchang had different opinions on Zhang Zhongxing, but they both thought that Zhang Zhongxing was an outstanding calligrapher who had made an important contribution to the development of Chinese calligraphy.