Although Pre-Qin Confucians and Mohists can be traced back to the same source, they had great divergences on many issues and started debate on them. Both schools had regarded showing piety to parents as positive. While Mohists proceeded piety from the perspective of “mutual benefit” and “reward”, Confucians did not. “Filial piety” according to Mohists is a link in the system of “concurrent love”, whereas according to Confucians it is a connection in the system of “benevolence”. Mohists criticized Confucians for their practice of luxurious burial and long period of mourning, which they thought had caused great harm to social production and people’s life and had wasted social resources. Starting from the perspective of a person’s true sentiment and humane value, Confucians thought that the institutional practice of abiding by the mourning ritual was conducive to cultivating human nature, human sentiment and fostering good social mood. Mohists maintained that “there is no differentiation of love” and they lashed at social injustice and the limited scope of love. Confucians maintained that “love with differentiation” means that loving people and loving things must be personal, that is, from an individual to the masses. Al though the concept of benevolence is universal, however, the practice and spread of benevolence is the embodiment of universality. ““love with differentiation” is a virtue and wisdom that go through practice. The shortcomings of Confucianism which the Mohists have pointed out are necessary complements for optimizing Confucian theory.