This paper,based on the concept‘protohistory’developed in the West,discusses how to drfrne Chinese protohistory.

The article intends to find out some profound historical reasons and theoretical roots for the emergence of the serious mistakes and deviation made by Mao Zedong.

There are five main historical reasons for the prevalence of sexual love literature during Ming & Qing dynasties.

This paper has posed its historical reasons of the Third-Line Construction from three aspects: Firstly, preparation for wars is the main reason of the Third-Line Construction.

Through the study between historical prototype and evolution of villa of building,the author probe into China tradition combining the natural principle of inhabiting and explore the old inhabiting environmental awareness and traditional ecological philosophy thought for creating the realistic meaning in which the modern living environment has.

Discussion about the historical reason of the folk forest industry development in Heilongjiang in the modern era

The paper has analyzed the calligraphy literature record in all previous bibliography from"HanshuYiwenzhi (汉书·艺文志)"to"Sikuquanshuzongmu (四库全书总目)", we outlined the calligraphy literature development survey and tried hard to reveal its historical reason.

Finally,Lenin once s aid there were historical reasons about it.