The poem was written in the 1930s by the Chinese linguist Yuen Ren Chao as a linguistic demonstration. The poem is coherent and grammatical in Classical Chinese, but due to the number of Chinese homophones, it becomes difficult to understand in oral speech. In Mandarin, the poem is incomprehensible when read aloud, since only four syllables cover all the words of the poem. The poem is more comprehensible—but still not very intelligible—when read in other varieties of Chinese such as Cantonese, in which it has 22 different syllables, or Hokkien Chinese, in which it has 15 different syllables.