Zhang Jun and Luo Theory

Zhang Jun, a minister during the reign of Emperor Gaozong and Emperor Xiaozong in the Southern Song Dynasty, played an important role in academic evolvement of the Song Dynasty.On the one hand, he appreciated Luo theory and recommended its scholars, creating an 'early Yuanyou political situation' and rejuvenating Luo theory, when he was appointed prime minister with Zhao Ding in the early Southern Song Dynasty.On the other hand, he advocated the theory of filial duty while restraining the development of Yuanyou's theory, when he became the only prime minister.He believed then that neither Yuanyou's theory was absolutely right, nor Xifeng's theory was completely wrong.But after Qing Hui dominated the court, Zhang Jun was banished.In exile, he accepted Luo theory completely and continued to advocate it by writing books and instructing his son Zhang Shi in learning the theory.Because of that, Zhang Jun was appointed minister in the period of Emperor Xiaozong and left a good name to posterity.