Written Chinese
Because the majority of modern Chinese words contain more than one character, there are at least two measuring sticks for Chinese literacy: the number of characters known, and the number of words known. John DeFrancis, in the introduction to his "Advanced Chinese Reader", estimates that a typical Chinese college graduate recognizes 4,000 to 5,000 characters, and 40,000 to 60,000 words. Jerry Norman, in "Chinese", places the number of characters somewhat lower, at 3,000 to 4,000. These counts are complicated by the tangled development of Chinese characters. In many cases, a single character came to be written in multiple ways. This development was restrained to an extent by the standardization of the seal script during the Qin dynasty, but soon started again. Although the "Shuowen Jiezi" lists 10,516 characters—9,353 of them unique (some of which may already have been out of use by the time it was compiled) plus 1,163 graphic variants—the "Jiyun" of the Northern Song Dynasty, compiled less than a thousand years later in 1039, contains 53,525 characters, most of them graphic variants.
A Syllabic Dictionary of the Chinese Language
Williams' preface to "A Syllabic Dictionary of the Chinese Language " explains, "The number of characters in this work is 12,527, contained in 10,940 articles, and placed under 522 syllables, which follow each other alphabetically, aspirated syllables coming after the unaspirated. Those syllables which begin with "ts", on account of their number, are placed by themselves after "tw'an"" (1874: ix). The additional 1,587 characters are differently written variant characters. For instance, the standard character 醫 for "yī" "medical doctor" has 酉 "wine vessel" indicating medicinal wine, but the earlier variant character 毉 has 巫 "Chinese shaman" indicating shamanic healing.