What classical empire based their bureaucracy on Confucian ideals?

In China, the Tang (618 - 907 A. D.) and the Song Dynasties based their bureaucracies on Confucian ideals (960 - 1279 A. D.) as a way of strengthening ethics thus ruling out corruption in civil service. In order to achieve this, every candidate aspiring to a job position in the government had to pass difficult tests on Confucianism.