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
Although there are currently over 4,000 Chinese surnames (, "xìng") in use in China, the colloquial expression for the "Chinese people" is Bǎixìng (百姓) "Hundred Surnames", and a mere hundred surnames still make up over 85% of China's 1.3 billion citizens. In fact, just the top three—Wang (王), Li (), and Zhang (張)—cover more than 20% of the population. This homogeneity results from the great majority of Han family names having only one character, while the small number of compound surnames is mostly restricted to minority groups. This has not always been true in Chinese history: between the first and fifth centuries AD, a law against multiple-character personal names briefly popularized two-character surnames and a number of important figures like Zhuge Liang and Sima Qian possessed them.