Unlike modern punctuation, judou marks were added by scholars for pedagogical purposes and were not viewed as integral to the text.
[A] The first book to be printed with modern punctuation was Outline of the History of Chinese Philosophy (中國哲學史大綱) by Hu Shih, published in 1919.
[2] Many ancient Chinese books contain thousands of words with no spaces between them; however, when necessary to explicitly denote a pause or break, judou marks such as "。" and "、" were used.
[citation needed] Qu Yuan's Li Sao used the character 兮 and grammatical particles to denote stops, similar to judou marks.
Because of this, East Asian punctuation marks are larger than their European counterparts, as they should occupy a square area that is the same size as the characters around them.