In fact,its port of departure located on the bank of Nan liu jiang,Hepu prefecture during the administration of Emperor Wu of Han Dynasty,now called Jiu zhou port,Quan shui town,Pubei Guangxi.

Phytoplankton and its trophic levels in Hepu reservoir;

② it is said that the people had a rather unanimous view,that is,three harbors of Hepu,Xuwen and Rinan in Beibuwan Bay were the earliest set sail ports of the maritime silk route of ancient South China,which is against Panyu theory.

The chemical compositions of the Hepu pearls are mainly calciumcarbonate, supplemented by organic matter and adsorptive water.

For most of the time, the Eastern Han Dynasty practised thd system of prefectures and counties.

In ancient China, shire and county system was a complicated course of evolution, which started with the mixture of both, then separated and finally became the phase that shire had jurisdiction over county.

During the exploration in Hepu Basin,with the four basic geologic conditions,including the hydrocarbon source rock condition(distance from inmature area and R o),reservoir condition(sandstone formation thickness and porosity),preservation condition(shale bed thickness and trap depth),and trapping condition(trap area and elevation),as evaluated e.

Hepu basin is a reprentative basin in south China, there are two source rock series ( Jiuxikeng formation and two members of Shangyang formation) in its lower tertiary system.

There are two source rock systems(E2j and E1S2)in Lower Tertiary of the Hepu basin.

Retrospective study on the surveillance of plague in Hepu County of Guangxi for a period of 50 years;

The result of survey and collection,the present situation of geography distribution and the cause in imminent danger of wild rice resources in Hepu county were reported in this paper.