cao bang

In the survey, archaeological survey in late November and early December 2010 in Hung Dao commune, Hoa An district, Cao Bang province, Vietnam Institute of Archeology ...

Sand, death pit and information on mud test results in Cao Bang are the outstanding information on the morning of November 13 on Science and Technology in newspapers.

'Red mud flood' in Cao Bang has recently been combined with smooth iron ore in the process of washing raw ore into fine ore.