During the course of exploring the socialist construction path which conforms to the practical situation of China,Mao Zedong gradually formed the thoughts on correctly dealing with all sorts of contradictions in the course of the socialist economic construction by way of integrating the view of two points with the view of focal point.

Space-element and contradictory problems consisting in design of architectural interior space;

Research on a contradiction problem-oriented dynamic description logic extention

The operators of contradiction problem solving were reviewed.

Extension Strategic Tactics Planning(ESTP), based upon the science of extenics, is established along a perspective of solving contradictory problems.

Based on the basic ideas and methods of Extenics, the laws of solving contradictory problems in the course of planning are explored, the theoretical and methodological bases are provided for planning research and a formalized approach, called extension planning, is formed.