Two distinct modern senses. (1) Confucian:
五常 =
仁 (benevolence),
义 (righteousness),
礼 (propriety),
智 (wisdom),
信 (faithfulness) - the 'five' half of
三纲五常. (2) Geopolitical: shorthand for
安理会五常 'the P5' - China, France, Russia, UK, USA. Context disambiguates: ancient ethics text → sense 1; foreign-affairs news → sense 2.