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.
Chinese classifier
Chinese has a large number of nominal classifiers; estimates of the number in Mandarin range from "several dozen" or "about 50", to over 900. The range is so large because some of these estimates include all types of classifiers while others include only count-classifiers, and because the idea of what constitutes a "classifier" has changed over time. Today, regular dictionaries include 120 to 150 classifiers; the 8822-word "Syllabus of Graded Words and Characters for Chinese Proficiency" () lists 81; and a 2009 list compiled by Gao Ming and Barbara Malt includes 126. The number of classifiers that are in everyday, informal use, however, may be lower: linguist Mary Erbaugh has claimed that about two dozen "core classifiers" account for most classifier use. As a whole, though, the classifier system is so complex that specialized classifier dictionaries have been published.