Abstract: Mencius paved a new path for moral building during the mid Warring States period when the fuction of building of Rites(li,礼) and Music(yue,乐) was fading away,and he maintained that cultivation stemmed from our original mind.In order to encourage moral confidence of normal people,Mencius declaimed that human nature is kind.However,Mencius referred to the four predispositions of our mind/heart as the four ’sprouts’ or ’beginnings’ of goodness.According to the two theories mentioned above we should expand the four predispositions of our mind/heart and cultivate our virtue.Only in doing so,can we achieve the goodness.Mencius thought that there was a trend to goodness in people’s mind/heart.So,for Mencius,moral building was a process.Education is the only process to nurture a sense of morality naturally and willingly.In order to nurture a spirit of manliness,to be a true man and to fulfill his value,one must follow the process of moral building and expand the four ethical attributes infinitely.