System is a product of human social practice and then the ethical system exists.Chinese traditional system of ethics in the pre-Qin period showed different context and characteristics of ideas.From the evil nature of humans,Xunzi finally settled in the community,political control and the institutional arrangements.The evil nature of humans was his theory cornerstone of the mechanism design."Righteousness" as the ideology of Xunzi's core values was its propriety,law system design and operation of the ethical value orientation.Xunzi's operating mechanism of the system was about three problems: ritual function of social organization,law of regulation effectiveness of the crowd,and dual control law targets of courtesy and law.Xunzi designed the system operation mechanism,which was based on the evil nature of humans,appealing to justice and the supreme criterion of the system of law and ceremony.It highlighted the double value of ethics and virtue ethics demands.As a Confucian,Xunzi emphasized on virtue ethics and ultimately used justice to integrate the law and ceremony,which showed the system virtue ethics prior to ethics.The idea of attaching importance to system but despising ethics led to the absence of objective system in Chinese history.It produced far-reaching implications on Chinese subsequent social and political thought and ethical concepts.