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 name
Because the small number of Chinese surnames leads to confusion in social environments, and because some Chinese parents have a desire to give individuality, some Chinese have received unusual given names. As of April 2009, about 60 million Chinese people have unusual characters in their names. A 2006 report by the Chinese public security bureau stated that of about 55,000 Chinese characters used in the People's Republic of China, only 32,232 of those are supported by the ministry's computers. The PRC government has asked individuals with unusual names to change them so they can get new computer-readable public identity cards, and the diversity prevents them from receiving new identity cards if they do not change their names.