Prosodic morphology studies the shapes and sizes of canonical words and affixation in a language. Although it is a new area in Chinese linguistics as well as in general linguistics, many prosodic morphological phenomena have been recognized starting a half century ago. Guō first pointed out the syllabic flexibility of Chinese vocabulary items in 1938, while Lǚ first recognized the morphosyntactic preferences between 2+1 and 1+2 syllabic patterns in 1963. For example, see (1).