When calligraphy developed into cursive script, it formed the habitual reverse and reverse strokes, and a tangible and intangible bond was formed between words, which precisely created the unique modeling characteristics and aesthetic pursuit of calligraphy, so calligraphy must be written from top to bottom and from right to left.
If you have a long experience of writing with a brush, you will have a feeling. When writing from left to right, there is always a feeling of panting and dying. After writing a word, you have to go back to the left, stand up and turn to the right before you start writing the next word. Repeat this action every time you finish writing.