ZHU Xi expanded and revitalized the ancient Confucian way of gaining knowledge by connecting the study of nature to the Great Learning. This Neo-Confucianism of the Song Dynasty brought new life to a tradition that had been neglected by later scholars. ZHU's contributions marked a significant shift in Chinese philosophy, introducing fresh ideas and methods. By reevaluating ZHU's work, we can better understand the value of traditional Chinese philosophy and improve how we study it.