Before papermaking was invented, the ancients wrote on bamboo slips. Bamboo slips and wooden slips are long and narrow pieces of bamboo, which can be rolled into books when strung together. The word "book" is a pictograph of bamboo slips. Jane in the left hand and a pen in the right. After writing, push one by one from left to right, line up, and then take the new Jane in your left hand.
This can make full use of the desktop space, and the new bamboo slips will not be confused with the already written bamboo slips. Therefore, writing is from top to bottom and from right to left.
Extended data:
From the characteristics of Chinese characters and people's physiological habits, because the right hand writes and the left hand holds the book, the stroke order of a word is naturally convenient from top to bottom and from left to right.
If you write from right to left, when writing the left half, the brush will inevitably cover the right half, which is inconvenient to arrange the structure and affects the beauty of the knot. The last stroke of each Chinese character is in the middle or lower right, and the last stroke of the previous word is followed by the beginning of the next word. Vertical writing is more convenient than horizontal writing, and it is more convenient for the consistency of strokes.
Xinhuanet-The Mystery of Ancient People Writing from Right to Left