開國紀念日 kāiguójìniànrì national day Origin Definitions Defs Strokes Stroke Words Sentences Sents 开国 開國 kāiguó to found a state To establish a new country or political regime.纪念日 紀念日 jìniànrì noun anniversary a day of commemoration or a memorial day; a date that celebrates or honors a past event, such as a national holiday or a personal milestone