Tianren ganying ô¸ìÑÊïëë (the interaction between Heaven and man) is an important notion in traditional Chinese culture. Along with the flowering of Neo-Confucianism during the Song dynasty, the traditional notion of the ¡°interaction between Heaven and man¡± also developed new aspects during this period. Cheng Hao and Cheng Yi, key founders of Neo-Confucianism, both held that the li ×â (Principle) or tianli ô¸×â (Heavenly Principle) is the ultimate basis of the ¡°Interaction between Heaven and man.¡± They also emphasized the interaction between original mind and all things when they explained the generating principle, which greatly reduced the dominant status of the mysterious ¡°Heaven.¡± As a result, the theory of the ¡°Interaction between Heaven and man¡± within their thought was converted to an emphasis on the immanence or the innermost being of the subject, which they referred to as ¡°original mind.¡± One long-term consequence of their interpretation is that the traditional notion of ¡°consistence between virtue and happiness¡± has been fitted with a more profound theoretical basis and stronger support. In this regard, it can be said that the Neo-Confucianism was not a simple system confined to the righteousness and virtue, since it also paid attention to utilitarian values and practices. What Neo-Confucianism advocates is the highest good which can create more happiness.