verb · to perform a heroic deed, render meritorious service, or make a worthy contribution, often leading to recognition or a reward

他在抢险救灾中立功受奖。

verb · to achieve great deeds for society as one of the three pillars of Confucian immortality (三不朽 sān​bù​xiǔ), alongside virtue and words

中国古代文人常将“立德、立功、立言”作为终生追求。