The Confucian preachment of morality, as in Plato, was predicated on the theory that the earthly way is the distorted shadow of the heavenly way; that the true pattern of temporal civilization is the mirror reflection of the eternal order of heaven.  Ganid elaborated with Jesus a summary on Confucianism when they were in Alexandria. 
Confucian precepts, while perpetuating the best of the past, were somewhat inimical to the very Chinese spirit of investigation that had produced those achievements which were so venerated.  The Zoroastrians had a religion of morals; the Hindus a religion of metaphysics; the Confucianists a religion of ethics. 
See also: UB 92:6.6.