This chapter synthesizes the alternation patterns in the morphophonology of Chinese affixation, and analyzes rime change (变韵 biànyuùn) mutation-like phenomena in terms of featural affixation. The main goal is to demonstrate that the paucity of affixation in Chinese languages/dialects does not render Chinese alternations less relevant to typological and theoretical pursuits. Two areas of morphophonology are examined to illustrate how phonetics/phonology interact with morphology under Chinese affixation: unexpected affixed outputs and the phonological realizations of featural affixes. Case studies of unexpected morphophonological outputs and unfaithful parsing of some root/affix features are reviewed, and the seemingly exceptional cases are explained by preservation of phonological/phonetic contrasts within the root-diminutive morphological paradigm and/or by morphological, prosodic and segmental principles and restrictions. An overview of the typology and characteristics of Chinese featural affixes is presented. The analytical approach rests on the theoretical underpinnings of non-linear phonology, the item-and-arrangement morphological model, and the notion of contrast preservation.