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.
Written Hokkien
Writing Hokkien using Chinese characters is a common method of writing in Taiwanese literature. However, there are various problems relating to the use of Chinese characters to write vernacular Hokkien, and in many cases Chinese characters are used alongside other scripts, such as bopomofo or POJ. The problem with using only Chinese characters to write Min Nan is that there are many morphemes (estimated to be around 15 percent of running text) which are not definitively associated with a particular character. Various strategies have been developed to deal with the issue, including researching and reviving the etymologically correct Chinese character from ancient Chinese texts, and classical Chinese, creating new characters, allocating Chinese characters used in written Mandarin with similar meanings, but dissimilar etymology, to represent the missing characters, or using romanization for the "missing 15%".