Are there categories of sacred and secular in Confucian culture?

Yes. The Confucian view of marriage believes that marriage is sacred, and along with the sacredness comes the destiny, morality, stability and durability of marriage; marriage is also secular, mainly manifested in functional utilitarianism and natural affection for people respect. Traditional Confucian marriage thought strives to achieve a balance between the sacred and the secular through morality, reflecting the dual affirmation of human natural and social attributes, and respect for human natural, material and spiritual needs. However, it often suppresses human nature in the name of "holiness" or "morality", and its means of achieving balance do not conform to contemporary moral standards.