Từ điển Hán Nôm

(1) four Confucian injunctions 孝悌忠信 (for men), namely: piety 孝 to one's parents, respect 悌 to one's older brother, loyalty 忠 to one's monarch, faith 信 to one's male friends
(2) the four Confucian virtues for women of morality 德, physical charm 容, propriety in speech 言 and efficiency in needlework 功