Pinyin alphabetical order, also called Pinyin-based order, or Pinyin order in short, is a sound-based Chinese character sorting method which has been used for arrangement of entries in Xinhua Dictionary, Xiandai Hanyu Cidian, Oxford Chinese Dictionary and many other modern dictionaries. In this method, Chinese characters are arranged according to the order of the Latin alphabet adopted in "Chinese Pinyin Scheme".
Pinyin alphabetical order is applicable to the ordering of both Chinese characters and words. It is primarily of alphabetical order and thus more simple and internationally acceptable than the traditional Radical-and-stroke sorting. The serious disadvantage of pinyin order lies in its disability to support lookup of words without knowing their pronunciations.