Abstract: While China is undergoing a process of rapid economic development, the construction of business ethics has been ignored and the traditional honesty concept has also been worn out.Commercial frauds in financial activities have expanded to an incredibly large area and some government officials even attempted to conceal the truth from the public, which seriously undermined the social credibility and stability.As a result, the construction of social credit has become an urgent matter.To explore the origin of credibility and its law of evolution, both internal and external problems should be addressed, and both short-term and long-term plans should be made.The construction of credibility should be carried out at both the grass-root level and the governmental level, thus forming a long-lasting mechanism of guidance by the government, enhancement of and supervision by the grass-root level.