序 xù HSK4 order, sequence Origin Definitions Defs Strokes Stroke Words Sentences Sents Showing: preface All meanings 4 xù 4 order 2introductory 1preface 1 1 sentence for 序 (xù — preface) 他在书的序中阐述了创作动机。 tā zài shū de xù zhōng chǎnshù le chuàngzuò dòngjī. He explained his motivation for writing in the book's preface. Source: Dong Chinese Dictionary