Why do traditional calligraphy have to use a writing brush?

1, traditional calligraphy doesn't have to use a brush. The earliest calligraphy Chinese characters were carved from Oracle Bone Inscriptions with a knife.

2. China's calligraphy is an ancient art of writing Chinese characters. From Oracle Bone Inscriptions, Shi Guwen and Jinwen (Zhong Dingwen) to silk script and paper, it evolved into Da Zhuan, Xiao Zhuan and brush official script, and to cursive script, regular script and running script in the Eastern Han Dynasty and Wei and Jin Dynasties. Calligraphy has always exuded artistic charm. China's calligraphy is a unique visual art, and Chinese characters are an important factor in China's calligraphy, because China's calligraphy was produced and developed in China culture, and Chinese characters are one of the basic elements of China culture. Relying on Chinese characters is the main sign that China calligraphy is different from other kinds of calligraphy;

3. Modern hard-pen calligraphy is the inheritance and development of traditional calligraphy.