Character amnesia
It is difficult to establish exactly how many different Chinese characters are in use today; the new HSK, a widely used proficiency test for Standard Chinese as a second language, tests over 2,600 different characters, whilst in 1988 the People's Republic of China published the "List of Commonly Used Characters in Modern Chinese" which contains 7,000 different characters. In Japan, where a smaller set of characters are in general usage, the Japanese Ministry of Education prescribes the teaching of 2,136 kanji in primary and secondary school in a list called the jōyō kanji, meaning "regular-use Chinese characters".
Naming laws in the People's Republic of China
Latin characters, numerals and other non-Chinese symbols are prohibited, as they do not constitute part of a Chinese name under government law. Only Chinese characters are permitted; however, characters which are unable to be input on computers are also disallowed. There are no limits on the number of characters used, as this may vary depending on the name (typical Chinese names on average constitute 2 to 3 characters, with 4 or more characters being rare; however, non-Han ethnic groups such as Mongols, Tibetans and Uighurs have many syllables after transliteration into Standard Chinese).