改扩建 gǎikuòjiàn renovation and expansion Origin Definitions Defs Strokes Stroke Words Sentences Sents 改 gǎi verb to change to change, alter, or transform; to switch from one thing to another扩建 擴建 kuòjiàn verbnoun to expand to extend or expand the scale of an existing building or facility, such as a factory, school, or airport