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".
Yuen Ren Chao
He also wrote "The Lion-Eating Poet in the Stone Den". This Chinese text consists of 92 characters, all with the sounds "shī", "shí", "shǐ" and "shì" (the diacritics indicate the four tones of Mandarin). When written out using Chinese characters the text can be understood, but it is incomprehensible when read out aloud in Standard Chinese, and therefore also incomprehensible on paper when written in romanized form. This example is often used as an argument against the romanization of Chinese. In fact, the text was an argument against the romanization of Classical Chinese and Chao was actually for the romanization of modern vernacular written Chinese; he was one of the designers of Gwoyeu Romatzyh.