CJK characters
Chinese is written almost exclusively in Chinese characters. It requires over 3,000 characters for general literacy, but up to 40,000 characters for reasonably complete coverage. Japanese uses fewer characters — general literacy in Japanese can be expected with 1,945 characters. The use of Chinese characters in Korea is becoming increasingly rare, although idiosyncratic use of Chinese characters in proper names requires knowledge (and therefore availability) of many more characters. However, even today, students in South Korea are taught 1,800 characters.
Written Chinese
Chinese characters conform to a roughly square frame and are not usually linked to one another, so do not have a preferred direction of writing. Traditionally Chinese text was written in vertical columns which were read from top to bottom, right-to-left; the first column being on the right side of the page, and the last column on the left. Text written in Classical Chinese also uses little or no punctuation, with sentence and phrase breaks being determined by context and rhythm. Vertical Chinese is still used for effect or where space requires it, such as signs or on spines of books.