Xia and Shang dynasty was the early phase of the development of dagger, and the use range enlarged to the foot with the change of the manner of the field operations.

The Sea Culture in Xia and Shang Dynasties;

Effect of Different Shading Measures on Increasing Production of Shangluo Pinellia;

A Comparative Study on Asexual Reproduction Experiments of Shangluo Pinellia;

The Research of Shangluo Pinellia s Tissue Culture;

In order to rebuild centralization ruling,the central Government crippled the power of local bureaucrats and supported commercial circles,casting a bond between them.

Cultural Lineage of the Xia-Shang-Zhou Period in the Beijing Area

However, most of the current researches focus on the relations between the Shanghai business circles and the Naking National Government, and few touch on the relations of the business circles, the Shanghai municipal government and the local apparatus of the Guomindang (.