What are the four words of traditional virtue?

The four-character idioms that express China's traditional virtues are: kindness and filial piety, humility and courtesy, honesty and trustworthiness, loyalty to the country, self-denial, honesty and self-discipline, generosity, diligence and honesty, courage and perseverance. China's traditional culture is extensive and profound, which is a traditional virtue and one of the standards and scales for dealing with interpersonal relationships. Everyone in China should demand from himself the traditional virtues of China.