The experience and lessons got in the contemporary countryside construction of China show that the construction of socialist new countryside could not be carried out unless under the unity of rational construction and traditional heritage,which is proved by the people’s commune before reform and opening-up in the 1930s.

In the history of development of human system civilization,natural evolution and rational construction are the two modes of system development.

The codification of European private international law manifests the constructive rationalism and the analyst philosophy, while the codification of American private international law is characterized by the evolutional .