On the basis of an analytical view of major influential factors of traffic safety in Chinese rural highway and the reasons how those factors are generated,contradiction between high speed development of rural highway traffic and less awareness of traffic safety of country residents is the main contradiction among rural highway safety issues at current stage.

It reveals main contradictions in the use of water resources along the Yellow River.

The viewpoint is criticised that the national contradiction has become the main contradiction between China and Japan since "Huabei Accident" in 1935.

Several major contradictions in building a new socialist countryside on the west side of the Straits;

That is the major contradiction of SOEs production relations and is also the reason for SOEs lack of energy, weak motivation and low profitability.

The main reason for the errors lies in that Mao Zedong’s analysis, adjudgement and orientation of social major contradiction and working center was increasingly divorced from objective reality in his late years.

At present,in the process of its popularization higher education is faced with two main contradictions:the c ontra-diction between the enlarging scale of tertiary colleges and their limit ed endurance ,and the contradiction between an increase in the number of students and unimpro ved teaching quality.

Principal Contradiction in Current InternationalCommunity and China s Strategy;

On the Party s Understanding of the Society Principal Contradiction Since New China Founded;

Mao Zedong firstly founded the contradiction theory of the socialist society,which then had been explored by Mao Zedong;On this basis,Deng Xiaoping distinguished socialist basic system from concrete system,and he solved the social principal contradiction problem effectively by method of the reform;According to the new.