I used to read from right to left. When did you change it?

Ancient etiquette was based on the right, so calligraphy was written from the right. In addition, the binding of ancient books is also on the right, so the straight-line characters also start from the right. After the May 4th New Culture Movement, western books gradually flowed into China. Foreigners' books are bound on the left and foreign languages are written from left to right. It is really convenient for most people who are used to writing with their right hands, so everyone gradually changed their old habit of writing. After the founding of the People's Republic of China, newspapers and periodicals were changed from straight to horizontal, and the arrangement of words was clearly defined from left to right.